The parts of the M16 and AR-15 are the same with the exception of the hammer, trigger, disconnector, selector and bolt carrier. First is the hammer. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative. The M16 hammer has an extra hook at the top which is caught by the auto sear. The only difference between the M4 and M16 is barrel length. A semi-auto receiver is not set up to fit an auto sear. The original design was equipped with a 20" pencil profile barrel. The mil-spec AR and M16 use forged 7075-T6 receivers. Only the early M-16 variants (Colt 601, 602, etc) had slab-sided lower receivers. Check out our guide on building a mil-spec AR-15. M4e1 stripped Aero lower. However, it is one of those differences that you pretty much have to see side-by-side to notice. The first ones were no more than scaled-down versions of the AR-10. Besides the civilian and military designations what’s the real difference between the M16 and the AR15? Home Forums > AR 15 Forum > AR Talk > How to tell the difference between AR-15 and M16 Discussion in 'AR Talk' started by anhiciano, Jun 21, 2007. Favorite Answer. All Rights Reserved. There are minor difference between a civilian AR and a military M4 or M16. The AR-15 is basically the civilian counterpart to the M16. Home Defense: AR-15 vs. That includes using an 80% lower. 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. Dec 24, 2011 #1. By 1963 the weapon was being sold in a semi-automatic version to the public and its M16 automatic version was being pitched to the military. This price difference is due to the National Firearms Act of 1934, the Gun Control Act of 1968, and the Hughes Amendment of 1986. You can buy a nearly finished AR15 receiver, with the locking pin holes and interior machining already done, and all you have to do is thread the rear for the stock tube. Just as effective as the M16 for fighting. The Marines were the last holdout, but eventually moved towards adopting the M4 as well force wide. AR15: The ArmaLite AR-15 is a selective-fire, 5.56×45mm, air-cooled, gas-operated, magazine-fed rifle, with a … The original design was equipped with a 20" pencil profile barrel. The AR-10 utilizes the .308/7.62x51, while the AR-15 uses the .223/5.56 x 45 cartridge. For example, which gas system can be installed on what barrels? To start, let’s talk a little bit about the history of these two rifles to get a sense of their purpose. AR15 vs. M16 vs. M4 – What’s the Difference? The M16 disconnector has an extra "tail" behind its spring notch to work with the safety lever. The rifle saw trials as part of a competition to replace the military's 7.62mm rifles. Many companies still sell their lowers with M16 trigger pocket dimensions, they are just missing the proverbial "third-hole".Drilling that third hole is what legally changes your AR-15 from a semi-automatic rifle, into an illegal machine gun. The .223/5.56 AR-15 rifle was a direct evolution of the 7.62×51 AR-10, which was developed by Eugene Stoner in the 1950’s. There are some good … Why separate names for something that is so similar, and which ones can we and can’t we own as civilians? These fully automatic rifles look identical to the typical AR-15. While we can’t sell you an M16, we can absolutely help you build a high-quality rifle with an AR 15 80 lower kit, one of our Build Kits, or Complete Uppers. The M16 trigger has a small notch cut into the far end to accommodate the M16's disconnector. I purchased an Anderson AM-15 lower receiver but saw a post for an Aero M4E1 receiver. You will never be this cool. Re: What's the diff between M16 and AR15 (mechanically & leg The differences are : Mechanically the lower receiver has an extra hole machined to pin the auto sear in place above the selector switch (also some manufacturer omit the machining inside the lower receiver to allow installation of an auto sear). Owning these parts together is called "constructive intent" and is illegal under federal law. Shop for cheap price Difference Between Ar15 And M16 Lower Receiver And Flat Dark Earth Lower Receiver Kit . Ratings: +0 / 0. M16 lower receivers have a third trigger pin hole for the auto sear, while AR-15 lower receivers do not. It was designed by Eugene Stoner and it is based on the Armalite AR-10 rifle. It only requires that it be less than %80 complete. Here we show you from start to finish, how to machine a quality and reliable 80% lower receiver. After Colt won it’s manufacturing contract, the M-16 was first shipped to troops overseas in Vietnam in 1964. You can legally use M16 parts on your AR-15 like the bolt carrier, but you cannot own an auto sear and a rifle. After 30 minutes, remove the raw lower and place it in the oven. Also, that receiver does not have to be completely built from scratch. The AR-15's lower parts kit is not capable of providing these two functions and can only afford semiautomatic fire -- one round per trigger squeeze. Video of Comparing M16 to AR-15 Lower Receiver Full auto lowers are always 0.5mm thicker then AR15 lowers, in every corner of the lower receiver. AR15 Stripped Aero lower Gen 2. This price difference is due to the National Firearms Act of 1934, the Gun Control Act of 1968, and the Hughes Amendment of 1986. We are a national retailer of individual components and not all products depicted on this website are legal in every state. Submerge your raw lower in chemical de-greaser for 30 minutes. The extra mass at the back of the carrier interacts with the sear and helps to reduce felt recoil during full-auto fire. Again, material is removed to prevent the bolt carrier on an AR15 from tripping an auto sear. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. If you get a factory made Colt M16 A2 in new (never fired) condition, it may run you around $25,000 or more. Difference between lower receivers? How To: Dissasemble & Clean an AR-15 BCG (Bolt-Carrier Group). Leave the lower in the oven at 250 degrees for 30 minutes. Nowadays, the AR-15 is the most popular rifle in America. There have been "drop-in" auto sear (DIAS) units made for the AR-15 by licensed FFL manufacturers for the AR-15's receiver, but these are not available for sale to the public and installing or using is still prohibited without licensing. Best answer gets 5 stars. With so many variations available now from the Pistol to SBR, or a service rifle to SPR or hunting variety, the AR-15 has developed into a platform suitable for the every man, and all of their needs. Minus the reinforcements on the front pin holes and the rear where the stock attaches, minus the accessories (pistol grip, FCG, etc) and the markings, what are the differences between the three Colt M16 stripped lower receivers? And what most people don’t realize, is that the military has also tested semi-automatic M16s as well, which later earned designations as the famed Mk12 Mod 0. At this point, the lower cannot be touched or contaminated by anything. Hell, with all the misnomers and different configurations hitting the market, you may very well think that all .308 parts are "AR-10" parts. The main difference between an AR-15 and an M16 lies in the lower receiver. The M-16 has remained with a 20” barrel from the time of it’s conception, which has become increasingly cumbersome as our wars have largely moved to densely-packed, urban environments. They will physically not fit, holes would have to be drilled in reciever and additional material removed from reciever to enable them to fit. Whether it's your first or tenth build, we'll break down the differences between the AR-9, .308, and AR-15 80% lowers you can more easily decide what your next black rifle (or pistol) build will be! Russian Rifle G&G Addict. Let's see how the M16 is different from the AR-15 and we'll also cover the M4 carbine. - AR-15 Lower Receiver These are where the similarities between these two rifles end. Almost all their parts are directly interchangeable. The M4 carbine was later introduced, further blurring the lines between Stoner's semi- and fully automatic black rifles. Q: Can I legally build an M16 from an AR-15? 110 0. To understand the different types of AR15’s, you first need to start with a little history. The AR-15 came first, in 1947; the M16 a decade later. The M-16 saw wide-spread use in the Vietnam War . Ratings: +0 ... is the magwell in the front is "flat" and cut in a little deeper to expose the bottom "lip" were as a ar15 lower kind of bulges out. We Join Lawsuit to Fight for 80% Nationwide! A: No. The hook at the top of the M16 hammer engages the automatic sear. The first ones were no more than simple scaled down versions of the AR-10. Stripped 80% lower Receivers. A: No. The M16 and AR-15 use the same polymer buttstock, forged buffer tube, and forged aluminum (7075-T6) in their lowers. These are where the similarities between these two rifles end. The easiest way to look at it is this: Every M16 is an AR15, but not all AR15s are an M16. There are many opinions and versions around the Internet about the actual differences between the M16 and AR-15. The primary differences between a select fire M16 receiver and a semi-automatic AR15 receiver is that the select fire receiver has some extra material … jerry, Mar 20, 2011. jerry, Mar 20, 2011. The M16 selector has a number of additional cut-outs and can be easily distinguished from the AR-15 version. The difference is the Pistol lower cannot accept a stock of any kind, where a Rifle lower can. m16 pocket lower, AR15 to M16 Class 2 Drilling and Check Fixtures For Class 2 manufacturers to easily and accurately place the holes for factory select-fire components into a previously semi-automatic-only weapon. OK...That said,my question is,Is the lower reciever different on an ar15 than on the M16 other than the markings for safe/semi/full auto. Differences Between High Shelf And Low Shelf Lowers. Initially offered primarily to Special Operations troops, the M4 (and M4A1) filled the role for a more compact weapon platform for urban environments, and for vehicle crewmembers with less space for a full size rifle. The M16 lower is designed to accept the auto sear where the AR has extra material to prevent it As to making an AR into an M16- ATF recommends not having any of the M16 versions of these part installed in an AR-15 because this can result in you being charged with possession of an unregistered machinegun. There are three main parts which are different between these two rifles. The primary differences between a select fire M16 receiver and a semi-automatic AR15 receiver is that the select fire receiver has some extra material removed and a hole drilled for an additional pin running through the trigger housing. Many people will tell you that an AR15 is semi-auto only, and the M16 is full-auto. The other difference is the lower reciever. AR15: The ArmaLite AR-15 is a selective-fire, 5.56×45mm, air-cooled, gas-operated, magazine-fed rifle, with a rotating bolt and straight-line recoil design. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, New Jersey, New York, Pennsylvania, and Washington). So, what are the differences? 6.5 Grendel vs. 6.5 Creedmoor: Which is Right For You? Technically, 80% lowers are stripped by nature, and do not need to be referred to as “stripped lowers”. There are many opinions and versions around the Internet about the actual differences between the M16 and AR-15. They look damn near the same, is there any differences … 80% Arms Joins Lawsuit Against ATF To Prevent 80 Lower Ban, Proudly Made in the United States of AmericaProudly Made in the United States of America, Monday-Thursday 12pm to 5pm PST Closed Friday, Saturday, & Sunday. M16 Rifle vs M4 Carbine comparison. The AR-15 traces it’s lineage back to 1956, when Armalite (then based in Costa Mesa, California), and Eugene Stoner designed a lightweight, gas-powered, selective-fire rifle for the United States Military. Allows users to fine tune the fit of the upper and lower receiver using a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. Development of the M16 required several iterations because of bullet design, firing modes, and structural reliability.The M4 came … © 2020 AR-15LowerReceivers.com, a division of Tactical Gear Heads, LLC. The original AR15 (before it picked up a military name) was fully-automatic, as well as plenty since then. ArmaLite decided to sell them the production rights to the AR10 and AR15 in 1962 after the many failed attempts for the AR 10 to catch on in high enough numbers so it was mass produced on a large scale. The AR-15 was designed in 1956 by Eugene Stoner of ArmaLite, an American small arms company based in California. Is the difference between these two lowers purely cosmetic? All it needs is milling and it will be ready to accept the LPK. The M-16 saw wide-spread use in the Vietnam War. Prices have doubled in the past 10 years or so, which is currently a lot better return than the stock market. Almost all AR-15 barrels are made from 4150 (CMV) steel used in the M16's barrel. A stripped AR15 80% lower receiver. A good place to look is here: AR-15 Vs. M16 Parts Ill show a couple of photos from Your Firearm Resource. Handgun. ​AR15 vs M16 vs M4: What’s the Difference? The most recent adaptation, the M16A4, was finalized in 1997, giving our soldiers the ability to mount optics and accessories to the top rail and handguard, giving them a rifle more adaptable to their environment and fight. As mentioned in their names, the high shelf lower receiver raises more elevated than the low shelf receiver. They are not and this can be a problem if you're building your own rifle at home. The AR-15 was a direct evolution of the AR-10, which was developed by Eugene Stoner in the 50’s. Let's review how the magic happening inside the lower receiver separates the semiautomatic AR from the fully automatic M16. Nonetheless, this disparity is not considerable. Difference between M16 and AR15? Shotgun vs. A simple spray-down will not do. While this may help for differentiating between the two for civilian purposes, this isn’t at all true. Hell, with all the misnomers and different configurations hitting the market, you may very well think that all .308 parts are "AR-10" parts. While the AR-15 was derived from the M-16, there several distinct differences. imize the possibility of misplaced M16 parts, but on most non-Colt rifles, M16 parts will fit in place of. On the lower receiver there is an addition hole just above the safety. Be the first to know about our product launches and deals. 1.9K views It’s a small percentage of the work. Lv 6. One of the most obvious differences between the AR-10 and the AR-15 is the caliber. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. There are endless questions when it comes to this topic, but we tried to answer the most common ones. The main difference between an AR-15 and an M16 lies in the lower receiver. These two rifles are nearly identical in materials and construction. A: No. Are there internal differences,or additional holes drilled in them or any other obvious differences or is the difference just the internal parts? M16 bolt carrier group, too. However, due to financial difficulties (probably related to manufacturing machine guns in California), they made one of the poorest business decision in history, and sold the design to Colt in 1959, as well as the rights to the names AR-15, and AR-10. What's the difference between the AR-15 and the M16, a military weapon? 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. AR15 Forums. Unless you're a Class 3 FFL, you can't build a machinegun. But the M4 carbine, introduced in the 1980s, is yet another departure from the AR's original design. Is there a difference between the M16 and AR15? Colt re-designated the AR-15 the M16A1 and provided it for service in Vietnam in 1964. However, one thing that has not changed has been it’s size. M4e1 stripped Aero lower. They guide the drill and provide precise hole placement so a valuable receiver is not destroyed. Difference between lower receivers? I purchased an Anderson AM-15 lower receiver but saw a post for an Aero M4E1 receiver. M16 lower receivers may also be milled to slightly different dimensions to accommodate the full auto fire control group. As inventory dries up, prices will continue to climb. When comparing an 80% lower to a stripped lower, a few key differences arise: And what most people don’t realize, is that the military has also tested semi-automatic M16s as well, which later earned designations as the famed Mk12 Mod 0. Proudly Made in the United States of America. The selective fire has varied between Semi/Full Auto, and Semi/Burst throughout the years.