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

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

This kit bundles an M4-style, 6-position adjustable carbine stock in FDE with a complete 9mm buffer system and a Davidson Defense 31-piece mil-spec Lower Parts Kit, giving builders the rear stock, 9mm-matched buffer components, and full internal fire control parts needed to finish a lower receiver.

Key Features

• M4-style, 6-position collapsible carbine stock in FDE
• Reinforced polymer construction, traditional M4-style carbine profile, molded cheek-weld surface
• Davidson Defense mil-spec heavy-duty carbine buffer tube, 6061 aluminum, Type II anodized, black
• 5.7 oz. solid steel 9mm carbine buffer and USA-made recoil spring
• Davidson Defense complete 31-piece mil-spec Lower Parts Kit included
• A2-style pistol grip in black included

Stock

The stock follows a traditional M4-style carbine profile, molded from reinforced polymer in FDE, with a molded upper cheek-weld surface and a molded, textured rear buttplate. Length of pull adjusts across 6 positions using a spring-loaded position adjustment lever, and the stock includes an integrated rear sling loop, built for mil-spec carbine buffer tubes.

Buffer Tube and Buffer

The buffer tube is a Davidson Defense mil-spec, heavy-duty 6-position carbine buffer tube 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.

Lower Parts Kit

The included Davidson Defense Lower Parts Kit is a complete, 31-piece mil-spec set covering the fire control group with a trigger, hammer, disconnector, and related springs, along with the safety selector, magazine catch components, bolt catch components, and takedown/pivot pin components. It also includes the pins, springs, and detents needed for lower receiver assembly, along with an A2-style pistol grip in black.

Follow all manufacturer instructions and safe handling practices.

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