Components

Barrel: 11.5" Black NitrideTwist: 1:7Caliber: 223 Wylde10" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 ACME Charging Handle     *Picture...

Barrel: 16" Parkerized 4150 Steel Contour BarrelTwist: 1:10Caliber: 6.8 SPC II12" Free Float HandguardACME AR-15 Upper Receiver Tool Craft 6.8 Mil-Spec Bolt Carrier Group AR-15 Nitride *Picture might...

Barrel: 18" Phosphate Fluted Twist: 1:8Caliber: .223 Wylde17" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 *Picture might show optional...

Barrel: 18" 4150 Parkerized Heavy BarrelTwist: 1:14Caliber: 458 SOCOM17" Free Float HandguardACME AR-15 Upper Receiver Tool Craft 458 / 450 Mil-Spec Bolt Carrier Group Nitride   *Picture might show...

CMMG Barrel and Bolt Group Kit, 16.1" 5.7x28mm The 5.7x28mm Barrel and BCG Kit allows you to build an AR in 5.7x28mm using CMMG’s patented Radial Delayed Blowback operating system. Unlike typical...

16 Inch 12.7x42 Complete Mlok Upper Product Specs:<

Barrel: 7.5" Black NitrideTwist: 1:7Caliber: 223 Wylde7" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 ACME Charging Handle     *Picture might...

Barrel: 16" 4150 Black Nitride M4 ContourTwist: 1:7Caliber: 5.56 Chamber15" Free Float HandguardACME AR-15 Upper Receiver *Picture might show optional accessories

This ACME Machine 16 inch .22 LR Pencil barreled upper is great for easy conversion to a dedicated .22LR setup and works with CMMG or most .22LR components. This is the only 22LR lightweight barrel...

Barrel: 10.5" 4150 Parkerized M4 ContourTwist: 1:7Caliber: 5.56 Chamber10" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 *Picture might show...

Barrel: 13.5" Black Nitride 4150 Steel Heavy BarrelTwist: 1:16Caliber: 45 ACP12" Free Float HandguardACME AR-15 Upper Receiver *Picture might show optional accessories

Barrel: 16" Black Nitride 4150 Steel Heavy BarrelTwist: 1:16Caliber: 45 ACP12" Free Float HandguardACME AR-15 Upper Receiver *Picture might show optional accessories

Ballistic Advantage 11" 9MM Straight Profile Modern Series 1/2x364150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant FinishSub MOA Guarantee10" KeyMod™ Free Float HandguardACME Muzzle...

Ballistic Advantage 11" 9MM Straight Profile Modern Series 1/2x364150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant FinishSub MOA Guarantee9.5" KeyMod™ Free Float HandguardACME Machine...

CMMG Barrel and Bolt Group Kit, 16.1" M4, 22 Long RifleEverything you need to convert your existing upper to a dedicated .22LR. Just purchase a magazine and you are ready to go.Features and...

Additional Info Length 22" Material

Barrel: 10.5" 4150 Black Nitride M4 Contour Twist: 1:10Caliber: 9mm10" Free Float HandguardACME AR-15 Upper Receiver ACME Charging Handle ACME 9mm Mil-Spec Bolt Carrier Group Nitride C158 *Picture...

First Release expected mid-late March. Additional Info Length 20"

Barrel: 7.5" Black Nitride 4150 Steel Heavy BarrelTwist: 1:10Caliber: 9mm7" Free Float HandguardACME AR-15 Upper Receiver *Picture might show optional accessories

The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile...