Upper Parts

This .223 Wylde chambered 14.5 inch barrel is machined from 416 Stainless Steel with a bead blasted finish. Ballistic Advantage's Premium Series Barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension. Hanson Series Barrels feature BA's...

This .223 Wylde chambered 18-inch barrel is machined from 416R Stainless Steel with a QPQ finish. Ballistic Advantage's Premium Black Series Barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension. This barrel features a longer .750”...

This .223 Wylde chambered 16 inch barrel is machined from 416R Stainless Steel with a QPQ finish. Ballistic Advantage's Premium Black Series Barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension. This barrel features a Mk12 Mod H profile...

Ballistic Advantage's 5.56 chambered 16 inch Government Profile Mid-Length Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension.   The .750” barrels...

These excellent quality gas blocks contribute to an efficient and reliable gas system for your AR15 or AR 308 rifle build. Features: Fits barrels with .750 Outer Diameter Constructed from 4140 hardened steel QPQ coating Low profile for easy fitment Set...

16" Barrel MIL-B-11595E CMV Chrome Lined 1/7 Twist Rate 1/2 X 28 Thread Pitch for Muzzle MilSpec Phosphate Coating Midlength Gas MPN SB51605-ML Length 16" Material MIL-B-11595E CMV Profile Government Finish MilSpec Phosphate...

These gas blocks contribute to an efficient and reliable gas system for your AR15 or AR 308 rifle build. Features: Features Aero Precision Logo Fits barrels with .625 Outer Diameter Constructed from 4140 hardened steel Phosphate coating Low profile for...

The Aero Precision PRO 5.56 Bolt Carrier Group is built from the ground up to meet the demands of the most extreme conditions. Each component and manufacturing process of the PRO 5.56 Bolt Carrier Group was deliberately chosen to increase the reliable...

The Enhanced Bolt Carrier Group for AR15/M16 platform weapons was designed to minimize carrier tilt and reduce friction inside the upper receiver by relocating key bearing surfaces. All materials, tolerances, and coatings meet or exceed milspec...

ABOUT THE RADIAN MODEL 1 COMPLETE UPPER, 10.5" .223 Wylde  ***IN STOCK*** The design philosophy behind the Radian Model 1 is simple: use the highest quality raw materials, most precise CNC machining equipment, and best components available to...

ABOUT THE RADIAN MODEL 1 COMPLETE UPPER Normally these products are built to order and require a long lead-time before shipment, but we hope to have a limited amount available soon. If you can Add-to-Cart, these products are ***IN STOCK*** The design...

ABOUT THE RADIAN MODEL 1 COMPLETE UPPER If you can Add-to-Cart, these products are ***IN STOCK*** (Normally these require up to a 10-month wait). If they're out of stock, let us know you want one! The design philosophy behind the Radian Model 1 is...

The Radian Model 1 Upper Receiver and Hand Guard are precision CNC machined as a matching set, structurally reinforced in critical areas for improved strength and rigidity. The upper receiver is cut from billet 7075-T6 aluminum and assembled with dust...

***In Stock***   The Ultimate Hard-Use 5.56 Bolt Carrier Group: These aren't designed to be pretty. They're not meant to compete with the gorgeous museum-quality $200+ units that other well-respected manufacturers are putting out. But this is not...

DLC Finish on Outer Wear Surfaces, Phosphate Extractor and Phosphate/CL Gas Key with OCKS Carrier Key Screws.  Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the military and small arms manufacturers. These are...

Introducing the E1M, a "modern" version of the XM177E1 with either an A1 or A2 upper depending on preference. The result is an extremely functional M-LOK capable carry-handle esthetic that means permanent sight availability even when it falls off a...

Now w/ OCKS Carrier Key Screws Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the military and small arms manufacturers. These are individually High Pressure Tested and then undergo a Magnetic Particle Inspection. We...

*Limited Time*: Check out our stubby 727 variant with a Colt 10.3" barrel here. We're big fans of the M4 platform and that includes the close ancestors to the M4 like the 727 and XM4. This upper receiver group features a 14.5" Chrome-Lined 5.56...

***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 -...

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...