Free Shipping on orders Got a decent supply this time but like everything COLT right now won't be here long. The mags are used but some look new, some look used we weeded all the not so nice ones out, also we will sell none that have dings or dents slight cosmetic bless yes.
You will get a good deal as you usually do from us so know that your buying from the Shark, and not just another business. We just wanted to add a few more pics so you all can see these are the real deal as pic 2 shows it has the grey spray inside the tube is what Colt does and it makes their buffer tubes the best!
PRICE Once again with the cloners in mind now while your in the middle of getting everything you need for your build do you want to worry where the sling is coming from. Heres a no brainer known as the Silent sling in Vietnam these slings have it all to go right on that M16 and work well. There mint in that package it took the abuse so the sling didn't. SAC Price AS we said on the home page, you want a quality Carrier for that tack driving Piston Rifle this is your chance to grab a Unicorn of a Carrier the Colt LEP carrier is just that animal.
Made of Colt Quality this carrier is made out of the exact same materials as there regular carrier is, made to spec this will NOT let you down. Please contact us for questions you may have on this item, please email us here: Sharkarmory gmail.
These are Genuine Colt parts with all exact markings. Colt Square upper receiver is from the Brass forge and is yet another awesome Colt upper receiver. We have these by them selves for Colt If you do not want the KAC M4 please notify us and we will deduct C price C price of Colt A2 muzzle Brake.
5.56x45mm – A2 Upper – M4 Barrel – 16″
Colt side sling swivel. These are getting very hard to find and source - if you see them in stock grab it while you can. Colt H2 heavy buffer.
These are sweet especially if your shooting the These are 4. Colt carbine gas tube, as well as rifle, and mid size gas tube. Made of stainless steel these guys are tougher then your normal gas tubes and hold up well in full auto fire.
Colt MPC marked original bolt only.The M4 carbine is a shorter and lighter variant of the M16A2 assault rifle. It has a The M4 is also capable of mounting the M and M grenade launchers. The distinctive step in its barrel is for mounting the M with the standard hardware. Following the adoption of the M16 riflecarbine variants were also adopted for close quarters operations. However, these rifles had design issues, as "the barrel length was halved" to 10 inches, which "upset the ballistics", reducing its range and accuracy and leading "to considerable muzzle flash and blast, so that a large flash suppressor had to be fitted".
Inthe first model was built, and it was tested in May The first models had an upper receiver with an A1 sight, and were given a longer The extended barrel improved the XM4's ballistics, reduced muzzle blast and gave the XM4 the ability to mount a bayonet and the M grenade launcher.
The XM4 was also given the cartridge deflector, as well as other minor refinements. The M4 was officially accepted into service by the U.
It would subsequently be used heavily by U. In the U. Army, the M4 had largely replaced M16A2s as the primary weapon of forward deployed personnel by Inthe United States Marine Corps ordered its officers up to the rank of Lieutenant Colonel and staff non-commissioned officers to carry the M4 carbine instead of the M9 handgun. As ofthe U. Marine Corps had 80, M4 carbines in their inventory.
By Julymajor Marine Corps commands were endorsing switching to the M4 over the M16A4 as the standard infantry rifle, just as the Army had done. This is because of the carbine's lighter weight, compact length, and ability to address modern combat situations that happen mostly within close quarters; if a squad needs to engage at longer ranges, the M27 IAR can be used as a designated marksman rifle.
Approval of the change would move the M16 to support personnel, while armories already had the 17, M4s in the inventory needed to outfit all infantrymen who needed one. Marine Corps. The switch was to begin in early and be completed by September On 1 Julythe U. Army took complete ownership of the M4 design.
The Army planned on fielding the last of its M4 requirement in Requested changes included an electronic round counter that records the number of shots fired, a heavier barrel, and possibly replacing the Stoner expanding gas system with a gas piston system.
The benefits of this, however, have come under scrutiny from both the military and civilian firearms community. Army's improved M4A1. In Septemberthe Army announced it would buy 12, M4A1s from Colt Firearms by the end ofand would order 25, more M4A1s by early If you are brand-new to the world of the AR rifle, you may be confused about the many different AR receiver types.
One way to gain a better understanding of what a receiver actually does is to compare it to the chassis of an automobile. As with a chassis, all essential AR parts are built onto the receiver. The AR receiver consists of upper and lower portions — the latter of which is the legally controlled, serialized part.
The A1 is the original AR upper receiver version. Developed in the s, the A1 was installed on the M A1 rifles used by soldiers in the Vietnam War. Key A1 features include a light profile barrel, forward assist and a fixed carry handle.
There is also a flip rear sight that adjusts for windage, but not elevation. The rear sight is also equipped with short- and long-range apertures.
The A1 provides a twist rate. In general, the AR A1 upper provides accurate firing within approximately yards. The A2 upper was introduced as an upgraded version of the A1 in the early s. As with the A1, the A2 is equipped with a fixed carry handle and a forward assist. However, the rear sight of the A2 is more advanced and is adjustable for elevation generally up to yards as well as windage.
The A2 also includes a heavier barrel than its A1 counterpart, as well as a left-handed brass and rounded handguards as opposed to the triangular-shaped handguards of the A1. Depending on the manufacturer, the A2 features a twist rate of either or The A3 upper receiver offers a flat top configuration featuring a detachable carrying handle. Depending on the manufacturer and model, an A3 upper may be equipped with either Picatinny or Weaver rail to serve as the mounting platform for scopes and other accessories.
The A3 also includes forward assist and rifle cuts in the feed ramp. Like the A3, the A4 is a flat top upper receiver, and both are very similar in their design and construction. 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. On the market today, you will most likely find A4-style upper receivers with variety of handguard and barrel options for customization.
We offer a wide selection of high-quality AR uppers from leading manufacturers. Check out our current AR upper receiver inventory today! View Our Selection of Upper Receivers. Oops, something went wrong. Please try again. AR A3 Upper The A3 upper receiver offers a flat top configuration featuring a detachable carrying handle. AR A4 Upper Like the A3, the A4 is a flat top upper receiver, and both are very similar in their design and construction. Back to Top. Get Exclusive Deals. Email Address:.It is made of chrome-moly steel with chrome lining and HP tested.
M4 Upper Receivers
The upper is Mil-spec and at a length of A extended A2 flash hider has been pinned and welded to be NFA compliant. We recommend a 55gr or 62gr bullet for best accuracy. The front sight is a A2 with bayonet lug. Toggle menu Gift Certificate Login or Sign Up 0. No reviews yet Write a Review. Current Stock:. Quantity: Decrease Quantity: Increase Quantity:. Share This Article. Then your feed ramps and chamber are polished and de-burred. All uppers are checked for proper head-spacing and test fired to ensure reliability.
Beware of sellers who refuse to tell you where their parts come from because all uppers are not created equal. We use only Milspec or higher quality parts for your upper. TNTE uppers are built with professionals in mind, we go through them with a fine tooth comb to make sure when you need it most it will be there for you. Our custom stripped uppers are covered by a one year warranty. Complete uppers have a limited lifetime warranty.
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AR-15 Upper Build Assemblies
Recommended Quick view. M16 5. Add to Cart.M4 Feed ramps on barrel extensions are a solid example. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Inadequate knowledge about these feed ramps can lead to lots of problems with barrels because they are essential parts to guide the bullet up and into the chamber. Regular feed ramps are cuts into the barrel extension only, which allows guiding the round into the chamber during loading, making them a fundamental feature of many breech-loading firearm designs.
Backing up a ton: The ramps on regular barrel extension are cut just to the edges, while the M4 feed ramps have deeper cuts in the M4-spec upper receiver. The leading cause that leads to the development of the M4 feed ramp is the gas pressure from the carbine gas system that is increasing along with a high cyclic rate.
M4 feed ramps will extend the barrel extension and the upper receiver. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver.
A closer look at uppers and barrel extensions. 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.
The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. The first reason is that they are, indeed, better. By using the M4 feed ramps for your firearm, you could pick up an increased percentage of the rounds, and feeding reliability would be improved. Another reason is that any commercial receiver and parts makers want to tool up to make upper receivers and barrel extensions, especially when shorter guns are becoming more popular.
M4 feed ramps are better! Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design.
On the other hand, I wouldn't consider them as a deal breaker, and they would not pass up a good deal with an upper only because it did not have them - the M4 feed ramps. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched.
If you consider this article useful, share it with anyone in need! Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. Don't forget read more information about it here! Save my name, email, and website in this browser for the next time I comment. You know what? In a Nutshell. What are M4 Feed Ramps? So, what is the difference between M4 feed ramps and regular ones?
An older-version or A2-style feed ramp is cut only on the barrel extension itself top. Why Do Shooters Need Them? Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps.
As they are becoming more and more a standard, and certainly do not do any harm to us. Related Video:. In a Nutshell To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Click Here to Leave a Comment Below 0 comments. Leave a Reply: Save my name, email, and website in this browser for the next time I comment.Out of Stock.
Unit Weight. Gift Certificate Amount. What Belong. Child Price. Regular Price. Parent Options. Original Description. Free Shipping. Affiliate Gift Certificate. Credit Amount. The heart of this upper half is Be the first to Write a Review. Yes, I would like to receive special offers, and to hear about new products and brands.
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The drop in Glacier Guard handguards feature a effective double heat shields to keep your hands cool during extended strings of fire. This receiver is equipped with a fixed A2 front sight gas block. Features: 16" M4 contour barrel 5.Discussion in ' AR Talk ' started by jxApr 9, Log in or Sign up. AR15 Forums.
Apr 9, 1. Apr 10, 2. FYI, you don't have to put the m4 cuts when using an M4 barrel, but it won't hurt, and you should get the M4 cut "benefits" which are next to nil on semi-auto. Apr 10, 3. Yes we do. As an official Mall Ninja. I take offense at that remark. If I or my fellow Ninjas.
Ever saw someone grinding an AR. We would go Kung foo on them. You are my official adviser on these weapons j4. Now now. My heart grows sad with sorrow, at the mere mention of grinding.
We buy only the best. Then we fire one round to make sure it works. Then spend 4 hours cleaning our weapons. Never too be fired again. We sell our women, children and pets, too Gypsies, for money too buy the best. Now I must meditate for 2 hours, at the mere thought of grinding. We Mall Ninjas have feelings. Please stop picking on us. Happy hour. I will show them what you guys said.