[ARCHIVED THREAD] - .22lr through match grade .223 AR barrel, https://www.cci-ammunition.com/whatsnew/newproducts.aspx. Due to overwhelming inquiries, we decided to bring back the ever popular AR-22 dedicated barrel production that exceeds the standard of function, accuracy, and overall pleasure to shoot for hunting, competition, and unbelievably enjoyable recreation. If it tapers, what is the muzzle diameter? The orange pistol grip fitting is a CZ competition- gun design cue. Great Company! I shoot a CMMG kit in my M4gery and with Federal and CCI could use a $.50 cent piece to cover my shots at 25 yrds. The .750" diameter barrel accepts standard AR-15/M16 gas blocks for extra mounting options. Alex B Our muzzle threading is 1/2"-28 and is available with a protective cap. Conrad served in the U.S. Army for 10 years. This is a Stainless Steel Select Match Grade barrel that has been taper lapped. Popular Bolt Action, AR, Ruger Precision Rifle, Savage Drop-In and Service Rifle Barrels. Copyright 2000-2023 . Thank you to the team at CLE and I cant wait to get some accurate rounds down range with this thing. It has shot excellent. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Our muzzle threading is 1/2"-28 and is available with a protective cap. Learn more about our Return Policy. Click to view or print our AR15 Barrels Price List.. Hi Eric, Thank you for your interest. Based on our popular 9mm ULW design, you've got a super light weight barrel with the center of mass very close to the upper receiver. This is a Stainless Steel Select Match Grade barrel that has been taper lapped. I'm going with a black on wood look and want to match the suppressor I'll have on if. You do far more damage to a barrel shooting .223/5.56 ammo than you do with 22LR. Also how does the threading affect the accuracy. For tighter groups, I would recommend match but bulk ammo is fine. Pin and weld, (.75 dia) brushed aluminum shroud, Designed to be used with CMMG barrel collar (.460 dia spud). All Rights Reserved. CMMG is a family-owned company that has been in the small arms business since 2002, providing their customers with some of the finest quality firearms products on the market without compromise. Greeneville, TN, We do offer this service for our Stainless Barrels. We believe these are the finest barrels on the market, each one is hand lapped. Our stainless steel barrel is bored and rifled by Lothar Walther in Germany. This fairly new rifle cartridge is designed to achieve high speeds at . The AR-15 Platform was originally designed around the 223REM and 5.56NATO cartridges and the AR-10 was designed around the 308 Win/7.62NATO round. Please Note: Most of the product images that we use . It was no better than using the adapter alone. Posted: 4/6/2023 3:27:58 AM EDT [#1] . Minuteman. Shop AR15 Barrels from Aero Precision. An Easy Conversion to .22 LR for Your Upper Receiver. Yes, the muzzle brake length will be in addition to the length of the barrel. Doing a search on rimfire central is another good place to find reports on CLE, JP, RRA and Keystone Accuracy. Fundamentally the marksman aims at himself. You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. Barrels come in a variety of lengths, materials, and designs to serve the specific purpose of your weapon. Skip to Content Toggle Nav Menu Account Shop Online AR15 Who Makes a 22lr match barrel for the AR? Barrels here come in many sizes and finishes to fit your firearm in the perfect way. The brake will screw on without any shims or washers. Dec 25, 2016. But if done with less care there will be a ramp rather than a step between these two differing diameters. Rifle Barrels; CMMG Barrel AR-15 22 Long Rifle 16.1" M4 Contour 1 in 16" Twist Chrome Moly Salt Bath Nitride with Chamber Adapter; CMMG Barrel AR-15 22 Long Rifle 16.1" M4 Contour 1 in 16" Twist Chrome Moly Salt Bath Nitride with Chamber Adapter Shop All Featured . Precision-machined stainless steel barrels feature a .223 Wylde chamber that helps maximize the long-range performance of your AR-15 with both .223 Remington and 5.56x45mm NATO ammunition. CAN YOU USE REG. The JP Rifles Kit is compatible with any standard Black Dog AR15 .22 style magazine. Thank you. All Rights Reserved. Or if the barrel tenon is not the same diameter throughout the length then a teeter totter effect is set in motion. If for any PARTS AND ACCESSORIES (Barrel Nuts, etc. Tactical Solutions 10/22 SB-X .22LR Tapered Takedown Barrel SBX 1022TDSBX-MB. It shot a .54 group with Cci blazers when I was perfectly still and had the same point of aim. This requires specialty cutting tools to create a very clean step. Will your barrel fit on a take down ruger or should I just get a standard 10/22? Based on our popular 9mm ULW design, youve got a super light weight barrel with the center of mass very close to the upper receiver. Our stainless steel material along with our unique manufacturing procedures guarantee that our match barrel will group 1/2" at 50 yards. Barrels must be fitted by a qualified gunsmith. AR15 Barrels . There are some definite advantages to using .22LR conversions to train with on AR/M4 platform firearms. Older Entries All of our barrels require a .920 bull barrel channel in the stock in order to drop in. AR-15 5.56/.223 Barrels. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. This is a Stainless Steel Select Match Grade barrel that has been taper lapped. Rainier Arms Ultramatch MOD2 6.5 Creedmoor Barrel - 22" As low as $450.00. We recommend using an anti-seize compound to assist in installation. Lomshek, I thought some of my results were the worst at 10 MOA. Granted, it will take a lot of rounds, but it is there. We offer finished barrels for AR-10, AR-15, Savage Rifles, Ruger 10-22, and Ruger 77-22. Get Daily Update Into Your Mail For Join Now, Shilen Ratchet Eck Contour Sporter Barrel, Muller Works 8 Groove SPECIAL ORDER .22lr Barrel Blank, Killough Shooting Sports - Secure payment. JP-22R Action Rimfire Are you striving to realize your potential in the world of action rimfire? Ruger 10/22 Price: $299.99 Barrel Length: 18.5 Total Length: 37 Weight: 5lb Capacity: 10+1 BUY YOURS NOW FROM OUR PARTNER We can't deny the best selling Ruger its rightful place at the top of the 22 LR list. This is the best .22 barrel I have ever used. Are they OK to use in this barrel??? This barrel only fits the standard 10/22 style build. Is the barrel a constant diameter, i.e., .92 or does it taper slightly. custom twist rate. a wide variety of twist rates that are appropriate for popular bullet weights in any given caliber but it is also possible to specify your own Our barrels are machined from a 1:16 twist 1.200 diameter 416 stainless steel blank in order to benefit from one piece construction for uninterrupted bolt-on and almost unbelievable accuracy from an AR-15 platform. This barrel is a true 1:16 twist rimfire barrel with an integral .22 LR chamber. *Must have a registered ARFCOM account to win. Shilen Ratchet .900 Straight Barrel Blank in .22lr. Mine slipped right in wit 2 taps from the my palm. This is a Stainless Steel Select Match Grade barrel that has been taper lapped. Buy Krieger Direct; Build a Custom Krieger; In Stock Inventory; . In fact with this chamber, depending on the ammunition used, it can be difficult to extract an unfired round. The Anschutz barrels receive a shorter and tighter diameter match chamber. Held under a minute of angle at 100 yards! Anti-seize is readily available at automotive stores. 22 Rimfire 1-16 inch Stainless Steel Straight 25 inch Contour. Read more about our Supermatch barrels here. The most popular barrel lengths are 7.5", 10.5", 12.5", 14.5", 16", 18", 20", 22" and 24". There are a few test reports on the different match 22 LR barrels in the precision rifle section here on ARF.COM. We will contact you as soon as this product is available. Some were around 1" Many Many Flyers from Wolf and CCI Target Calling KIDD not I am not happy. Call 1-315-677-9841 for more information. Sorry to report that My SS bull Barrel has not Performed as Advertised.I only shoot Benchrest and sad to say My groups were well over 1.5" at 50 yard. I will buy another without question. Add To Cart . . Barrel Length: 18 inches Weight: 6.8 Pounds Capacity: 10-15 Pros. Then run a clean patch through and look at the patch. Continue reading I am using a AATS1022 Deluxe Target Stock that comes with a barrel tensioner block. Cmmg Ar-15/M16 22lr Dedicated Barrel $ 208.99. This is the highest grade barrel that Shilen makes. It is best if you can get the barrel tenon started into the receiver mortise, then turn it over and tap the back of the receiver with a rubber mallet. If order a barrel today, how long until delivery ? The Rimfire Report: Is Match Grade .22LR Worth the Cost? 22LR is a low velocity round so the friction and powder burn that normally wears a barrel is far far less with 22LR the same reason pistol barrels last so long is because you are not . We do not recommend shooting CCI Stingers in our barrels due to stinger cartridges being longer than standard ammunition. I don't have a place to do short range practice with centerfire ammo. From dedicated bolt groups to barrel collars, you wont find a throw away part here. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Krieger Barrels offers a full range of services for our bolt action, service rifle and AR style barrels. (BULK) 22LR AMMO OR DOES IT ALWAYS HAVE TO BE MATCH GRADE? KIDD. We have been in business since 1986 and are located in Alford, Florida. Pre-payment is required REPLACEMENT BARRELS for RUGER rimfire- (Click here for complete listing) Ruger 10/22, 77/22, 10/17 & 77/17 Ruger Mini-14 Find suppliers in your country or get the information you need to complete and submit your own US State Department license so that we can export to you. This barrel's mid-length gas system is compatible with .750-inch gas blocks. KIDD, Is the only difference between the Black bull barrel and this Match bull barrel the material they are made of (Stainless Steel vs Chrome Moly)? AR15 DCM 223 Wylde in 7.7 Twist with Threaded Muzzle. Thinking that maybe that was a fluke, I had to go back this afternoon and confirm; each of five five-round groups was perfect. Choose your barrel length, preferred profile and the conversion kit that suits your needs. Sincerely, Full Member. . You do far more damage to a barrel shooting .223/5.56 ammo than you do with 22LR. Just got installed really quickly. Does the muzzle break add length to the barrel? . Sort by: Relevance Shilen Ratchet .850 Straight $299.95 Shilen Octagon .900" Straight Contour $299.95 Shilen Ratchet R5 Contour The diameter is .920" (just under an inch). Doing a search on rimfire central is another good place to find reports on CLE, JP, RRA and . If the shoulder of the barrel does not set flush against the receiver then again the support isn't there. Shilen Octagon .900" Straight Contour Barrel Blank in .22lr. There are a few test reports on the different match 22 LR barrels in the precision rifle section here on ARF.COM. Sign up to receive promotional emails roughly once a month. Copyright 2011 Beyer Barrels. However, I have nothing but high praises for Paul and Theresa at CLE. Copyright var date = new Date(); document.write(date.getFullYear()) KIDD Innovative Design. Affordable; Compatibility with Ruger 10/22 mags; Endlessly customizable ; Cons. 5.56 NATO, .223 Wylde, 300 Blackout, .224 Vaklyrie and 6.5 Grendel offerings. CM Bull Barrel Assy Currently Unavailable. Using .22LR ammunition makes it easier to afford and access the volume of ammunition it takes to become truly proficient with your AR/M4 system, and we have the .22LR components needed to get set up. KIDD .22LR Match Polished Stainless Steel Rifle Bull Barrel, hello friend, I want to buy 16.5'' to diy, so could you tell me the external diameter How many rifle line? Is there any test done to see the accuracy between the barrels? All rights reserved. AR22 4 Barrel $ 89.00 Read more; AR22 8.25 Barrel $ 89.00 Read more; AR-22 Barrel Collar $ 24.00 Read more; AR22 Forward Assist Assembly $ 20.00 Add to cart; AR22-114 Charging Handle Assembly $ 19.95 Add to cart . KIDD Aftermarket Black .22LR Receiver Classic Slip Fit Model, 11 degree crown, 1:16 twist, convex extractor slot. Brought Grandpa's ole rifle back to life. Additional Information. Finish Chambered, Threaded, Ready to install, Sometimes great things need to be done slowly, Fluting, chambering, custom twist, custom contours and more, Popular and rare calibers for bolt action, AR, M1G, M1A and more, Fully custom velocity, accuracy and pressure test barrels, Every Krieger barrel is made in the USA and always will be. Ruger Precision Rifle DROP-IN BARRELS New RPR Rimfire NEW Alternut DROP-IN BARRELS Products::Rifle Barrels::Barrel Grades Select Match Grade These stainless steel masterpieces of machining and lapping are intended for the competition shooter-- or even the hunter-- who wants the ultimate in accuracy and quality. This is a Stainless Steel Select Match Grade barrel. There are cheaper ways to manufacture imposter products, but cheap has no place where this kind of lifetime quality is concerned. We changed our barrel design some time ago and no longer offer the seamless design for our barrels. Noah Young I don't know the PSI of gas that gets around the bullet during jump, or the air ahead of the bullet during it's travel, but I don't like the chance of ironing chunks into the surface. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Keith. Build your bolt gun blank from the steel up with contour, groove and caliber options or build a service rifle or AR barrel with all available options and services including fluting and chambering and much more. Comparable to setting down a tall glass with a convex bottom, it wants to tilt. Compass Lake Engineering has been serving customers all over the United States for over 30 years. KIDD. C. clmayfield Gunny Sergeant. When you're building an AR-15, you have many options. Weve come out with a NEW ULW barrel for the 22 Long rifle round to be used with CMMG barrel collars in the AR22 platform. barrels. MGW carries CMMG barrels which are precision made of quality materials just like any other product from CMMG. Good shooting! Thank you, The KIDD v-block is sold separately. Tippmann M4-22 Pro Offering a solid .22 LR option for those who like that AR-15 style, Tippmann's M4-22 Pro brings a 16-inch barrel length to an overall 31.25 to 34.5-inch length (depending on stock position). Thank you, Thank you for your interest in our products. Thanks Kidd ?????? Stainless Steel Match Grade Stainless Steel Select/Match Grade PRE-THREADED AND CHAMBERED BARRELS Pricing is for a 26" or shorter finish length. A dust cover can be added as an option. Follow the manufacturer's suggestion, which usually instructs leaving the cleaner to soak in the bore for about 5 minutes. In this Barrel and Bolt Group Kit, CMMG provides everything you need to convert your AR-15 into a dedicated .22 LR rimfire training platform. I use a .22lr conversion bolt on beater barrels without worrying about it. This is a Stainless Steel Select Match Grade barrel that has been taper lapped. From stock configuration to grip choice to buffer assembly, there are endless . The 22LR barrel groove diameter is not the same as the 223 grove diameter. Now you can practice, plink, or hunt with inexpensive .22LR ammo. Right To Bear is proud to partner with CMMG Inc. to bring our customers high-quality .22LR long rifle barrels and conversion parts for the AR platform. This is the highest grade barrel that Shilen makes. Fired a few rounds through and worked like a charm, love that it is so lightweight and cant wait to see what it can do will post again when I can get to the range. Good shooting! MDT LSS Gen2 Anshutz Match 64 Chassis System Rimfire Currently Unavailable. Shop our selection of .22LR barrels today and save with free shipping on select products. .22 LR Conversion Kit for Your .223/5.56 AR15. We don't currently offer this barrel in black. Lapua X-ACT Specifications. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Dramatic improvement in accuracy even in a factory 10/22 rifle. You may unsubscribe at any moment. Copyright 1996-2023 AR15.COM LLC. I have 2 of these a 20" SS non fluted bull that shoots around 1/4" at 50y with lapua, and a 16.5" non fluted bull that shoots sub 1/5" at 50y with lapua. Should I install this or I let the barrel free float? This is America's favorite rifle and has been basically forever. Our 5R barrels are produced using the same methods and standards of match-grade quality as all of our barrels. The chamber, crown and hand lapping of the barrel stay consistent through our entire line of barrels. This legendary action is a tried and true Ruger design that ensures consistent, reliable performance. KIDD, Do the Kidd barrels for the 10/22 come with the v-block, or is the stock one sufficient? ), RTB / CMMG 22LR Conversion Chamber Adapter, AR-22 Kit - RTB Dedicated .22LR Kit - 4.5" Barrel/ Stainless Bolt Group/ Charging Handle + 50rd Mag, AR-22 Kit - RTB 4.5" .22LR AR Barrel & Stainless Bolt Group Kit + 50rd Mag, AR-22 Kit - RTB Dedicated .22LR Kit - 9" Barrel/ Stainless Bolt Group/ Charging Handle + 50rd Drum, RTB Dedicated .22LR Kit - 9" Barrel/ Stainless Bolt Group/ Charging Handle, RTB Dedicated .22LR Kit - 4.5" Barrel/ Stainless Bolt Group/ Charging Handle, RTB 4.5" .22LR AR Barrel & Stainless Bolt Group Kit, RTB 20" .22LR AR Barrel & Stainless Bolt Group Kit, RTB 16" .22 AR Barrel, M4 Profile - .22LR, RTB 16" .22LR Pencil AR Barrel & Stainless Bolt Group Kit, RTB 16" .22 AR Barrel, Pencil Lightweight Profile - .22LR, RTB Dedicated 9" 22LR Barrel + 22LR Bolt Group + (3) 25-Round Magazines, RTB Dedicated 4.5" 22LR Barrel + 22LR Bolt Group + (3) 25-Round Magazines, CMMG 16" .22 AR Barrel, M4 Profile - .22LR, CMMG .22LR 4.5" Barrel and Stainless Bolt Group Kit. MDT LSS-22 Chassis System for CZ 455 (1) Currently Unavailable. First, there is glass in the priming compound of rimfire cartridges that can lead to accelerated wear of the bore if not kept clean. This is a Stainless Steel Select Match Grade barrel. . You might also consider some of the "new" poly coated CCI .22 LR ammo. Another problem area to be aware of is the proper utilization of the shoulder. Email: sales@opticsplanet.com, 9AM-7PM CT Mon-Fri Do they both have the same chamber and crown and are both hand lapped? The barrel is then cut to final length and crowned with an 11 degree target-type crown. This is a Stainless Steel Select Match Grade barrel that has been taper lapped. Tippmann M4-22 Pro 499 at Palmetto State Armory Rimfire rifle barrels by Shilen, Holeshot Arms and Benchmark. Fluting, chambering, assembly, accurizing, muzzle threads, satin bead blast and more. I prefer a .92 constant. Quantity: Add to Wish List. This is a Stainless Steel Select Match Grade barrel that has been taper lapped. The best I could get in a different barrel is 3 MOA, but that conversion has to stay in to maintain it. Here is a link to the product. Easy instillation and I couldn't be happier with KIDD. The RTBA brand brings you the only lightweight .22LR pencil barrel on the market at an affordable price! AR-15 Barrels and AR-10 Barrels in a variety of lengths and twist rates. From 20 caliber to Four Bore, Krieger Barrels offers a wide variety of popular and rare calibers in bolt action, AR-15, AR-10, M1 Garand, M1A/M14 I received the barrel yesterday and installed it in a snap. Long-Term Durability & Reliability For 6.5 Creedmoor Rifles Faxon Firearms Match Series 22 Inch Heavy Fluted 6.5 Creedmoor Barrel is the ideal component for AR-10 enthusiasts to achieve long-range accuracy. Remington Standard Velocity .22 LR ammunition Barrel Length/ Velocity 28 1095 26 1107 . Both are great! For that purpose, please find our contact info in the legal notice. KIDD, A COUPLE OF QUESTIONS.I SEE YOU HAVE AN 18" POLISHED, THREADED BULL 10/22 BARREL ON EBAY FOR $254.95. Our barrels are chambered to accept .22 LR ammo and have a 1:16 twist. improved dpms pattern bull/varmint ar15 barrel 24 inch national match 223 wylde fits 223 remington as well as 5.56 nato ammunition. with countless match wins and . Do you make this barrel in black? . We want to ensure that making a return is as easy and hassle-free as possible! View Details Rainier Arms Ultramatch MOD2 300BLK Barrel - 16" As low as . A little on the heavy side for a .22 Ruger and 10/22 are Registered Trademarks of Sturm, Ruger & Co. Inc. Our aftermarket replacement for the .22LR bull barrel is the ultimate performer in accuracy. AR15 CARBINE: Carbine.22 Cal: 0.218 IN: 0.224 IN: $380.00.223 REM . I plan to purchase all Kidd parts to build a 10/22 rifle using a Revolution Yukon stock. A proprietary chamber reamer is used to ensure the cartridge and bullet feed smoothly. Good shooting! . . Hi, I've seen some pictures with the brake installed and some pictures shows a taper between the barrel and brake while others you can't even tell they're 2 separate pieces. Any way you can finish this as your other barrels in black? Hope to shoot in some local rimfire comps. Proof Research AR-15 Barrels: 22 LR AR-15 Barrels: 5.56/223 AR-15 Barrels: 224 Valkyrie AR-15 Barrels: 6MM ARC AR-15 Barrels: 6.5 Grendel AR-15 Barrels . KAK Industry 4'' 9mm AR-15 Barrel, 1:10 QPQ Nitride , 1/2x36 Thread . barrels Grid List There are 23 products. Money well spent. The barrels measure 4.5, 9, 16.1 and 20 inches long and are machined from 4140 chrome-moly steel, complete with a salt-bath nitride finish . Thank you for your interest in our products. Using .22LR ammunition makes it easier to afford and access the volume of ammunition it takes to become truly proficient with your AR/M4 system, and we have the .22LR components needed to get set up. Finished Barrels. *Must have a registered ARFCOM account to win. Download our exclusive shooting targets for FREE ($47 value) The Short Barrel Going short for an SBR or AR-pistol ( Best Pistol Braces )? A proprietary chamber reamer is used to ensure the cartridge and bullet feed smoothly. 61 products / 184models, Volquartsen Firearms THM S&W M&P 15-22 Sport Lightweight Threaded, Faxon Firearms 22 inch Heavy Fluted Profile 6.5 Creedmoor, Volquartsen Firearms Lightweight Threaded Rifle, Chiappa Firearms M4-22 Gen II Pro 16 Inch Heavy, CMMG, Inc 9mm NATO Mk9 Upper Receiver Group, CMMG, Inc 300 AAC Blackout Mk4 Upper Receiver Group, Vism Key Mod Short Vertical Grip - Tool Less, MDT LSS Gen2 Ruger American Chassis System Rimfire, MDT LSS Gen2 Anshutz Match 54 Chassis System Rimfire, MDT LSS Gen2 CZ 455 Chassis System Rimfire, MDT LSS Gen2 Anshutz Match 64 Chassis System Rimfire, MDT LSS Gen2 Savage Mark II Chassis System Rimfire, MDT LSS Gen2 CZ 452 Chassis System Rimfire, FireClean Fouling-Resistant Oil 2 Ounce Bottle FC-2. 6 Smith & Wesson M&P 15-22 Sport .22LR - Best AR-Style .22 LR Rifle. Krieger Barrels exports to over 15 countries outside of the US. 189179 Highway 101 SouthForks, WA 98331ph: 360-640-1497clintbeyer@olynet.com, Our premium-quality aluminum alloy barrels are fullymachined to precise, match grade tolerances from exceptionally hard 7075 aluminum.The 7075 aluminum ismuch stronger than many mild steel alloys andgives all the benefits of a thick barreland improves theheat distribution for better accuracy. These barrels are light weight ranging from 13-18 ounces - less than half of the weight of traditionalsteel barrelsweighing up to60 ounces.A customBeyer Match Chamber is inserted in all barrels. (verified owner) January 18, 2021. The action features a 60-degree bolt throw, which works faster and provides more clearance for larger scopes. Why doesn't everybody use this extractor slot? aBOUT US. Shilen Ratchet R0 Contour Barrel Blank in .22lr. The store will not work correctly in the case when cookies are disabled. Wilson Combat Ar-15 Ranger Barrel 300 Blackout $ 249.95. Have not used it past that. $203.40. Additional cost may or may not apply depending on machine time. We have an extensive collection of rifles, barrels, and accessories, as well as offer custom work. I look forward to adding a KIDD trigger, bolt buffer, and charging assembly from KIDD to complete my ultimate small game gun. Super easy mod, lovin' it! Fax: +1-866-534-3097 Valkyrie. However, I need to do some short range practice with a new scope I put on an upper with a $350 match grade barrel. Best in the business. Theyve earned my business and Ill continue to buy from them. All of our threaded barrels now have a chamfer between the thread protector and the barrel.

Truth Table Symbols, Sedgwick Funeral Home Canton, Il Obituaries, Brae Burn Country Club Membership Fee, Articles M