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We're big fans of the M4 platform and that includes the close ancestors to the M4 like the CAR-15/723 and its shorter barrel brother 733, another variant that makes frequent cameos in popular culture. This upper features a Colt 11.5" M4 Chrome-Lined 5.56...

We're big fans of the M4 platform and that includes the close ancestors to the M4 like the CAR-15/723, one of our favorite variants that makes frequent cameos in popular culture. This upper features an LMT 14.5" M4 Chrome-Lined 5.56 Carbine-Length Barrel...

B5 Systems Grip Plug for Type 22 and 23 P-Grips Friction fit for easy removal/install Water and dust resistant Matte Finish Compatible with AA, 123A, CR2032 Batteries, and MultiTasker NANO Tool Black The Battery Grip Plug is a water and dust...

These melonite (black) gas tubes are a key part of an efficient and reliable gas system for your AR15 or AR 308 rifle build. They offer increased heat and corrosion resistance compared to non-finished gas tubes. Features: Melonite Gas Tube for AR15...

These melonite (black) gas tubes are a key part of an efficient and reliable gas system for your AR15 or AR 308 rifle build. They offer increased heat and corrosion resistance compared to non-finished gas tubes. Features: Melonite Gas Tube for AR15...

***Does Not Include Carrier*** Mil-Spec Bolt - CHROME C158 Steel Shot Peened High Pressure Tested (HPT)  Magnetic Particle Inspected (MPI) *Ejector is either Chrome or Phosphate Chrome Silicon Ejector Spring by Sprinco Mil Spec Extractor -...

A fantastic foundation for a precision battle rifle, this Aero Precision M5 Complete Upper features a 18" Stainless Steel barrel and a 15" Atlas R-One handguard. This complete upper does not include the bolt carrier group (which can be found here) or...

The B5 Systems Type 22 P-Grip offers an increased vertical grip angle to improve ergonomics and ensure proper trigger index. The lack of a backstrap places the hand higher on the grip for maximum engagement. Aggressive Texture for Increased...

The Geissele Super Duty Upper (Stripped) features the quality and worksmanship you've come to expect from the Geissele name.   At the heart of this stripped upper is a Super Duty upper receiver that mates to a MK16 Super Modular rail via a center...

Designed to fit AR-15 and M16 barrels, the BCM low-profile gas block is machined from high quality steel to Mil-Spec tolerances. Gas block includes set screws for mounting and a phosphate finish for corrosion and wear resistance.  .750" inside...

  This genuine, Colt factory part is the one used by our GI’s on the M-4 carbine to allow attachment of M203 grenade launchers or forward mounted lights and lasers. Steel, two-piece unit clamps directly around the barrel between the barrel...

Genuinely mil-spec, you can rely on the same small parts as the military. Includes: Mil-Spec Small Parts 2x Takedown/Pivot Pin Detents 2x Hammer/Trigger Pins 1x Selector Detent 1x Bolt Catch Pin 1x Bolt Catch Plunger 1x Buffer Retainer   Mil-Spec...