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

Black M4-Style Adjustable AR-15 Carbine Stock & Skeletonized Straight Trigger Lower Parts Kit with 6-Position Buffer Tube, 5.7 oz. 9mm 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 and a Davidson Defense Gen 2 Match Grade Lower Parts Kit featuring a 3.5-pound single-stage skeletonized straight trigger, giving builders the rear stock, 9mm-matched buffer components, and an upgraded trigger group needed to finish a lower receiver.

Key Features

• M4-style, 6-position collapsible carbine stock in matte black
• Reinforced polymer construction, traditional M4-style carbine profile, molded textured buttplate
• Davidson Defense mil-spec heavy-duty carbine receiver extension, 6061 aluminum, Type II anodized, black
• 5.7 oz. solid steel 9mm carbine buffer
• Davidson Defense Gen 2 Match Grade Lower Parts Kit, 31 pieces
• Skeletonized straight trigger shoe, single stage, 3.5 lb. pull weight, steel with Black Oxide finish
• Mil-spec A2 pistol grip in black included

Stock

The stock follows a traditional M4-style carbine profile, molded from reinforced polymer in matte black, with a molded, textured rear buttplate and an integrated rear sling loop. Length of pull adjusts using a spring-loaded position adjustment lever, built for mil-spec carbine receiver extensions.

Buffer Tube and Buffer

The buffer tube is a Davidson Defense 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.

Lower Parts Kit

The included Davidson Defense Gen 2 Match Grade Lower Parts Kit is a 31-piece set built around a skeletonized, straight trigger shoe machined from steel and finished in Black Oxide, running as a single-stage trigger with a 3.5-pound pull weight. The fire control group includes the hammer and disconnector, along with the safety selector, bolt catch, magazine catch, and trigger guard. Pivot and takedown pins, along with the full set of pins, springs, and detents, round out the kit, and a mil-spec A2 pistol grip in black is included.

Follow all manufacturer instructions and safe handling practices.

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