Black M4-Style Adjustable AR-15 9mm Carbine Stock Kit with 6-Position Buffer Tube, 5.7 oz. Buffer, Recoil Spring, End Plate & Castle Nut

Black M4-Style Adjustable AR-15 9mm Carbine Stock Kit with 6-Position Buffer Tube, 5.7 oz. Buffer, Recoil Spring, End Plate & Castle Nut

This kit bundles an M4-style, 6-position adjustable carbine stock in black with a complete 9mm buffer system for AR-15, M16, and M4-style carbine platforms. It includes a mil-spec 6-position carbine receiver extension, a 5.7-ounce solid steel 9mm carbine buffer, a USA-made recoil spring, a US Tactical mil-spec receiver end plate, and a Davidson Defense mil-spec castle nut.

Key Features

• M4-style, 6-position collapsible carbine stock in matte black
• Reinforced polymer construction with molded cheek-weld surface and textured buttplate
• Built for compatible 9mm carbine buffer systems
• Mil-spec heavy-duty carbine receiver extension, 6061 aluminum, Type II anodized, black
• 5.7 oz. solid steel 9mm carbine buffer
• USA-made standard AR-15 carbine recoil spring
• US Tactical mil-spec receiver end plate and Davidson Defense mil-spec castle nut included

Stock

The stock is built from reinforced polymer in matte black, featuring a molded upper cheek-weld surface, a molded textured buttplate, and an integrated rear sling loop. Length of pull adjusts across 6 positions using a spring-loaded adjustment lever, matching the buffer tube's adjustment range.

Buffer Tube and Buffer

The buffer tube is a mil-spec, heavy-duty 6-position carbine receiver extension machined from 6061 aluminum and finished in Type II anodizing, measuring 7.15 inches long with a 1.145-inch outer diameter, a 1-inch inner diameter, and a weight of 3.8 ounces. It's paired with a 5.7-ounce, solid steel 9mm carbine buffer built for pistol-caliber cycling, along with a USA-made standard AR-15 carbine recoil spring. A Davidson Defense mil-spec castle nut in black and a US Tactical mil-spec receiver end plate complete the receiver extension hardware.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.