Spike's Tactical Calico Jack Rifle Lower Build Kit, M4 Style FDE Buttstock

Spike's Tactical Calico Jack Rifle Lower Build Kit, M4 Style FDE Buttstock

This is a Spike's Tactical Calico Jack AR-15 rifle lower build kit built around a Spike's Tactical Calico Jack forged 7075-T6 aluminum lower receiver with a MIL-A-8625F Type III Class 2 hard coat anodized black finish, a Mil-Spec pattern, multi-caliber markings, and Parley, Argg, and Plunder selector markings engraved on both sides of the receiver. The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group. A Mil-Spec A2 style pistol grip in black covers the grip interface. The buffer system consists of a Mil-Spec heavy-duty AR-15 6-position carbine buffer tube in aluminum, a standard AR-15 carbine recoil buffer at 3 oz., and a standard AR-15 carbine recoil spring made in the USA. A US Tactical AR-15 and M16 Mil-Spec receiver end plate and an AR-15 carbine castle nut complete the rear hardware. A Davidson Defense AR-15 and M16 Mil-Spec 6-position adjustable carbine stock in FDE reinforced polymer with a spring-loaded adjustment lever, a textured non-slip buttplate, and an integrated sling loop closes out the rear end.

Key Features

• Spike's Tactical Calico Jack forged 7075-T6 aluminum lower receiver, MIL-A-8625F Type III Class 2 hard coat anodized black
• Mil-Spec pattern, multi-caliber markings
• Parley, Argg, and Plunder selector markings engraved on both sides
• Complete Mil-Spec AR-15 lower parts kit with Mil-Spec A2 style pistol grip, black
• Mil-Spec heavy-duty AR-15 6-position carbine buffer tube, aluminum
• Standard AR-15 carbine recoil buffer, 3 oz.
• Standard AR-15 carbine recoil spring, made in the USA
• US Tactical AR-15 and M16 Mil-Spec receiver end plate
• AR-15 carbine castle nut
• Davidson Defense AR-15 and M16 Mil-Spec 6-position adjustable carbine stock, FDE, reinforced polymer, spring-loaded adjustment lever, textured non-slip buttplate, integrated sling loop, Mil-Spec carbine receiver extension compatible

Perfect For

• AR-15 rifle builders sourcing a complete lower build kit on the Spike's Tactical Calico Jack receiver with a Davidson Defense FDE M4 style adjustable carbine stock included
• Shooters pairing this kit with an existing upper assembly who want a Calico Jack lower and a Davidson Defense FDE stock with an integrated sling loop covered in one package
• Builders who want a distinctively marked black Spike's Tactical lower receiver paired with a Davidson Defense FDE carbine stock for a two-tone black and FDE exterior on the lower side

Lower Receiver

The Spike's Tactical Calico Jack lower receiver is a forged 7075-T6 aluminum receiver finished to MIL-A-8625F Type III Class 2 hard coat anodize standards in black. The Mil-Spec pattern receiver carries multi-caliber markings and the Calico Jack-specific selector markings of Parley, Argg, and Plunder engraved on both sides of the receiver body. The receiver accepts standard Mil-Spec AR-15 components throughout the lower.

Lower Parts Kit and Buffer System

The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group, including the fire control group, magazine catch, bolt catch, and all associated pins and springs. A Mil-Spec A2 style pistol grip in black covers the grip interface. The Mil-Spec heavy-duty AR-15 6-position carbine buffer tube in aluminum, standard AR-15 carbine recoil buffer at 3 oz., and standard AR-15 carbine recoil spring made in the USA form the complete buffer system at the rear of the lower. The US Tactical AR-15 and M16 Mil-Spec receiver end plate and AR-15 carbine castle nut lock the buffer tube down cleanly at the rear of the receiver. The Davidson Defense AR-15 and M16 Mil-Spec 6-position adjustable carbine stock in FDE reinforced polymer fits directly onto the Mil-Spec carbine buffer tube and closes out the rear end with a 6-position adjustable length of pull locked by a spring-loaded adjustment lever, a textured non-slip buttplate for consistent shoulder contact, and an integrated sling loop for sling attachment without additional hardware. The FDE color of the Davidson Defense stock provides a contrasting finish against the black anodized lower receiver, giving the lower build a two-tone exterior from receiver to stock.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.