I dont care for the collapsible stocks and love the look of the full size rifles. Another option if you still want an adjustable would be to look at magpuls ACS-L as it is longer than a m4 stlyed stock and locks up tight to the receiver extension unlike the m4, it too can take an extended butt pad for added length too but doubt you will need it as extended length of pull is … M4 barrel is light under the handguards and has a notch for mounting a M203. The emergence of the Russian AK-47 forced a redesign of the M14 to increase firepower and dependability, resulting in the adoption of the M16 during the Vietnam War. I like the A2 flattop. D2 is the hardest to sharpen. The M4 was produced in the 1990s at the request of the US Special Forces, which is a version of the M16A2, designated M4 Carbine. I suppose it does give the rifle more of a military appearance, if that is important to some. I would say that a M-4, especially if you've put some optics on it, is probably a better choice, than an A2, in … Based on looks. When you finish speaking, don't forget to wipe. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. The M16 was designed in 1956 and replaced the M14 as the U.S. military's standard service rifle in 1969. forces in the Korean War. I have a few ARs already, both carbine length and mid-length, all with the 16" barrel. Harder to find in the true A2 configuration, but you can get exceptionally close with the Aero Precision A2 upper receiver for about $425.00. The M4 and M4A1 rifles have a flat top Picatinny rail upper receivers. This was noted by most all the Operational Test participants, especially when they fired the standing/off-hand leg of our rifle qualification course. To start, let’s talk a little bit about the history of these two rifles to get a sense of their purpose. At a first glance, the M4 looks like a shortened M16, and that’s exactly what it is (technically an A2 configuration with a shorter handguard, shortened barrel, and relocated gas block). Otherwise, I would vote A2. I too am fairly new to the AR15 family of firearms and have learned a lot, and have a lot to learn. [ARCHIVED THREAD] - Difference between A2 and M4 Barrel Profile, https://www.youtube.com/watch?v=Jmi3SzkOIiQ, http://i1011.photobucket.com/albums/af233/avenger1970/AR15%20Photos/20170109_231528.jpg, https://www.ar15.com/forums/t_3_128/690199_Barrel_and_Gas_Types.html#i7104609. Oh boy. M4 1:7 Yes A2 991: Colt SMG: 4th Generation Short Ribbed S-1-F Flattop No Yes They might not be exact if you measure with calipers at other points along the barrel, but it's close.). Generally, if you call the "thin-behind-the-gas-block, heavy-in-front-of-the-gas-block" barrel in any length a "Government profile, XX inches long" most people will know what you are talking about. If you want to learn a lot about the history of the armalite rifle I recommend checking out Christopher Bartocci on YouTube. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Bushcraft could mean just woodcraft or a lot more. There is no blanket best steel. The problem isn’t the problem, pointing out the problem is the problem. Amen.". Any use of this content without express written consent is prohibited. The class depicts the tensile strength of the bolt divided by 10. Best for what use? And to make matters worse, there were early production, mid-production, and final version of some of the variants. Besides, the A2 is still an inch shorter than the 20" shotgun I use for HD. Personally, I do not prefer the M4 notch/cut-out in the barrel for the grenade launcher. I prefer the look of the A2 over the M4 but I have to be honest.....my Colt LE6920 is AMAZING!!!!! Raining. Uses the 30 round standard magazine. M4 1:7 Yes A2 978: M4 Carbine Enhanced: 4th Generation M4 S-1-3-F Flattop Yes Yes 5.56 NATO 14.5 in. Engine. The M4 is a shorter and lighter variant of the M16A2 rifle, with 80% parts commonality. So about the only advantage of the A2 profile was to give the rifle a little more muzzle hang. As with all other A3s, the carry handle can be removed and a massive array of sights (red dot, … If you run the A2 wet it functions well but the M4 runs wet, dry, or full of dirt and it will usually function. The world of the military M16 and, by extension, the civilian AR-15 market, has become dominated by M4-style firearms. Not necessary from a functional standpoint though. In fact “solid carbide” tooling is typically 85% or 90% tungsten carbide particles, in a matrix of 10% or 15% cobalt to hold them together. I prefer a rifle. It’s rare now to find an upper receiver or a ready-to-go barrel that doesn’t have the M4 cuts. O1 probably the easiest to sharpen. For a better experience, please enable JavaScript in your browser before proceeding. For example, my "M4gery" has a Bushy 14.5" M4 barrel with a permanently-mounted, 1.5" long "Phantom" flash hider which makes OAL the legal 16". So we shall flow a river forth to thee and teeming with souls shall it ever be. However, an M4 barrel extension is dished more so the feed ramps could extend downward, and then an area within the upper is shaped to match. Posted August 27, 2009 in Rifles by Steve Johnson with 43 Comments Tags: army, m16, m4, Marines, military, rifle, rifles. So you've been training on the M4 for five years, been through several courses and you decided that you like a 20" A2 HBAR? And that is the important thing! 06-26-09, 08:36 #9. Inside a house, and at CQB distances, the M-4 is a superior firearm. OK so I'm a little confused about the differences in barrel variations of the following barrel profiles. M4 Carbine: Unique Role and Adoption. Thanks for the help and all the information appreciate you taking the time to share and help! If you’re looking for something a little bit different from the … Is the ground still hard if the shove is friendly? M4 1:7 Yes A2 979: M4A1 Carbine: 4th Generation M4 S-1-3: Flattop Yes Yes 5.56 NATO 14.5 in. For example, a bolt marked "A2-70" is a 304 stainless steel bolt with a … NOT FOR REPRODUCTION-contains hopefully illegible copyrighted material. This will include the 20″ A2 barrel, a 1-7 twist, chrome lined barrel, and fixed front site. Not to try and confuse things with all of this. A quick, and possibly somewhat inaccurate history may help... (Also note that the measurements for barrel thickness are under the handguard. A selection Daniel Defense M4 AR15 Barrels demonstrating the Government profile. Some really good reading appreciate the help and your time responding. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. The biggest difference in the two barrels you describe is that the "A2" profile is a midlength gas system. 1,895. In the civilian world, the 16"(really 16.1" or so, as a caution against accidentally making it less than 16" due to mfg. A 20" 5.56mm barrel has several key advantages over the common 16" barrels. Carried the A2 a bit too. However! A military M4 barrel is similar to a 20" A2 barrel, with about 5.5" removed between the chamber area and the gas block/fsb, M4 feed ramps, and a short section ahead of the gas block reduced in diameter to accommodate mounting an M203 (usually called the M4 cut). I will have one in my collection some day. Some folks do, but I don't. One of these days the youngins are going to realize that not all wars are to be waged inside a city. Im building a AR-15 with a 16 inch barrel my question is what is a better choice as far as barrel profile The standard A2 Government profile or the M4 style. Civilian guns have to be 16" BEFORE any removeable muzzle-end device. Military M4 barrels are 14.5", with the standard A2 flash hider attached bringing OAL to about 15.5". The M4 Patrolman Carbine also comes in A2 and A3 versions. M4 feed ramps will be up to the mfg. You can’t tell the difference by looking but take them both to the range and you can see the difference. A2 977: M4 Carbine: 4th Generation M4 S-1-F: Flattop Yes Yes 5.56 NATO 14.5 in. I love the A2 style rifles. Short answer: The M4 has a three-round burst mode, while the M4A1 has a full-auto mode. With a QUALITY barrel and a nice optic you can do some accurate longer range shooting. For shooting small groups at long ranges, hunting, or similar uses, then perhaps. But the M4 certainly wasn’t the first attempt to configure the rifle for a specific application – it was the result of half a century of learning. I prefer the rifle-like feel of the A2 myself. Need to clean cut hanging 1" manilla rope? Hopefully someone can dumb this down for me and explain it. A forum community dedicated to Glock firearm owners and enthusiasts. M4! Copyright © 1996-2021 AR15.COM LLC. The bolt type and metric class is usually marked on top of the bolt head, for instance "A2-70." The M4 has several improvements. Advantages: Relative toughness, wear resistance. FL CCW Permit holder since 1991- C&R FFL Holder since 2007, "If you're not shootin', you should be loadin'. I only discovered this recently so I thought I would share. In nomine Patris, et fili, et Spiritus Sancti. The M4 and its variants fire 5.56×45mm NATO (and .223 Remington) ammunition, and are gas-operated, magazine-fed, selective fire firearms with either a multi-position telescoping stock or a fixed A2 or LE tactical stock. Robb Jensen. What it is: CPM M4 is a "Crucible Particle Metallurgy" carbon tool steel, widely regarded as a "super steel" for its properties and performance. PM-M4 provides an outstanding balance of toughness, wear resistance, and tensile strength, and will perform in the most demanding applications. It is illegal for a regular civilian to have the grenade launcher anyway, so why have the notch? Army M4 vs. Marine M16A4. AFAIK, there is no US military standard for a 16" barrel. Stick a bayonet on the front end and it makes for an effective spear. The barrel extension and the receiver both have to have the cuts. The rifle-platform M16s don’t use them. There is no M4A2 or A3 (not in the government inventory), although there are M16s up to A4. I'd say for defensive uses, no. CPM M4. Sep 14, 2010 #7. After the gas port it … I really tried to talk myself into a 16" recently, and the mid-length was tolerable, but they just seemed too small for a rifle and too big for a true submachine gun, particularly since they don't have a happy switch. The M4 came along as a carbine for airborne troops and … Aside from working at Colt, he wrote the book (literally) on them. The M4 barrel is lightweight under the handguards, until just before the gas port. Fuel, Cruising range. The most popular barrel profile now is the M4 style, sometimes a direct copy of the 14.5″ military M4 barrel, but more often slightly extended to 16″ for legal civilian use. Development of the M16 required several iterations because of bullet design, firing modes, and structural reliability.The M4 came … The M4 was the original “official” carbine version of the M16 and was, as I recall, adopted in 1994. AR-15 Barrel Profile: A2 Government vs M4 style? I prefer A2's as well - they feel more natural. The A2 fire control group was modified to do away with full auto fire in favor of a three round burst mode. Tracing it’s roots to the compact XM177 and the GAU-5 of the Vietnam war, the M4 began development in 1984 and was officially adopted in 1991. Or CPM-D2, CPM-3V or CPM-M4. This means greater hit probability at longer ranges. For thee, my Lord for thee. Ideally, tool steels would contain as much carbide volume as needed for the desired wear performance. Carried the M4. Commercial versions of the A2 often feature barrels with 1:9 twist rates adn heavy profiles under the handguards. In the recent conflicts in Afghanistan and Iraq, long-distance engagements have been the norm, so every meter matters. For now my LE6920 will have to get me through the apocalypse for now lol. M2 vs A2 Buttons Stamping modern materials does not only require superior punch performance. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). I built the M4 myself and I made sure all the tolerances were correct. There is an interesting article at Human Events about the US Army culture favoring the M4, while the Marines culture being pro-M16A4. Power hath descended forth from thy hand, that our feet may swiftly carry out thy command. error) mid length A2 will be really close to a military 20" A2 barrel, with approximately 4" removed between the chamber area and the gas block/fsb. Thanks think I got it. Takeaways. Suite 500, Troy, Michigan 48084 USA. M16A4 has a 600 meter effective range. I also have an M4. What is the difference between an AR-15 A1 vs. A2 Lower? Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. Being the more modern weapon, the M4 is more modular. If you want uncompromising fixed blade toughness AND wear resistance you want 3v or (this might come as a shocker) some good old A2. A2 style muzzle brake. Really depends. The A2 style buttstock is also good for cracking heads. JavaScript is disabled. A2 and A4 bolts come in different metric classes. All of the M4 family of rifles have a 14.5 inch barrel length with a carbine length gas port system. The mil actually only specs “M4 feed ramps” for use in its M4s. Too many to cover. All Rights Reserved. The dual aperture rear sight system on the A2 carbines affords wind and elevation adjustment. Buying a Complete AR15 A2 Upper Receiver. "And Shepherds we shall be. Black Rain Ordnance Flash Suppressor. ", Outdoor Hub, LLC (d/b/a Carbon Media Group), 3290 W. Big Beaver Rd. "Better" is subjective. Split the difference and build a 16" or 18" precision rifle (I have a soft spot for a scoped, SS-barreled AR):supergrin: Both configurations have their place, but I prefer the M4 set up overall. A2 vs A3 Specification - Whats the difference ... including the M4 carbine. Come join the discussion about optics, gunsmithing, styles, reviews, troubleshooting, accessories, classifieds, and more! Oct 13, 2006. Outside the house, and in the MOUT environment, the A4 is a superior firearm. The M16A2 has a 20-inch barrel with a firing range of 600 meters. This factor accounts for differences in wear resistance among, say, O1, A2, D2, and M4. An M4A1 in the hands of a United States Army Soldier. M4 and A2 Feed Ramps. Disadvantages: Relatively more difficult to sharpen than CPM 3V and predecessor tool steels like A2, not as tough as CPM 3V or CPM 4V. The main difference between the A3 and A4 is that the latter includes M4-style feed ramps, which serve the purpose of complementing the feed ramps found on an M4 barrel. If you're not loadin', you should be movin', if you're not movin', someone's gonna cut your head off and put it on a stick.

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