Brownells 75th Anniversary - A Shooting Heritage
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This complete upper includes Aero Precision’s new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision’s proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

M4E1 Threaded Assembled Upper Receiver comes with a 16” 5.56 Mid CMV Barrel. The upper also features a low profile gas black, M4 feed ramps, .250 takedown pin holes, laser engraved T-Marks, and includes port door as well as an installed forward assist.

The Brownells M16 5.56 Complete Bolt Carrier Group is constructed with a bolt made from 9310 steel, which is finished with a heat treatment and shot peening. The carrier is fabricated from 8620 hardened steel. Each element of the bolt-carrier group is finished in a black-nitride coating.
The Brownells M16 5.56 Complete Bolt Carrier Group comes with a bolt, bolt carrier, gas key, firing pin, cam pin and a firing pin retaining pin.

The KE Arms AR-15 GI Parts Kit has every part you need to assemble your bare lower receiver into a functional piece for your custom AR-15 or M4 build. All parts Made in USA.
Standard AR-15 charging handle, machined from aluminum.  Features a matte black anodized finish.

With the popularity of short, pistol-length, AR-style firearms on the market, more of today's AR owners are seeing a phenomenon that occurs on semi-automatic firearms with short gas systems: overgassing. The result of overgassing is increased wear on internal components, as well as increased felt recoil. To address these issues, Aero Precision launched its AR-15 Carbine Buffer Kit.

The kit ships with a mil-spec buffer tube machined from 7075-T6 aluminum and features slots for a six-position buttstock. The kits also include a buffer spring, end plate and castle-lock nut.
Magpul Original Equipment (MOE) carbine buttstock provides the quality, durability, and ergonomic benefits of Magpul’s CTR stock in a rugged, economical, drop-in package. Strong, A-frame design is lightweight and comfortable, yet provides operator with plenty of support. Comb contour is wider than standard issue M4 stock to help shooter maintain a solid, consistent cheekweld. Streamlined exterior and protected release lever won’t snag on clothing, gear, vehicle interior, or vegetation. Heavy duty, spring-loaded release lever allows fast length-of-pull adjustments and won’t dig into your hand. Impact- and heat-resistant, polymer construction includes molded-in reinforcements at stress points, plus two slots for web slings and a hole for a toe-mounted sling swivel or clip-on sling. Soft, synthetic rubber buttpad increases comfort and helps prevent slippage. Mil-Spec fits 1.14"" O.D. buffer tubes on Colt-manufactured M4 and similar mil-spec tubes that accept both four- and six-position collapsible stocks.

BROWNELLS - AR-15 M4E1 16" UPPER BUILD KIT 5.56MM

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Cartridge: 5.56 mm NATO

Finish: Black

Style: Assembled

Length: 16"

Muzzle: 1/2-28