Spike's Tactical Calico Jack Pistol Lower Build Kit, Polymer AR Brace

Spike's Tactical Calico Jack Pistol Lower Build Kit, Davidson Defense Polymer AR Brace

This is a Spike's Tactical Calico Jack AR-15 pistol 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 heavy-duty hardcoat anodized black aluminum pistol buffer tube for AR-15 and AR style pistols, 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 black reinforced polymer AR brace with a lightweight skeletonized design, a flat end profile, an angled support structure with reinforced bracing geometry, and an integrated ambidextrous QD sling socket 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
• Heavy-duty pistol buffer tube, aluminum, hardcoat anodized black, AR-15 and AR style pistol compatible
• 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 polymer AR brace, black, reinforced polymer, lightweight skeletonized design, fixed, flat end profile, angled support structure with reinforced bracing geometry, integrated ambidextrous QD sling socket, pistol buffer tube compatible

Perfect For

• AR-15 pistol builders sourcing a complete lower build kit on the Spike's Tactical Calico Jack receiver with a Davidson Defense polymer AR brace included
• Shooters pairing this kit with an existing upper assembly who want a Calico Jack lower and a lightweight skeletonized brace with an integrated ambidextrous QD sling socket covered in one package
• Builders who want a distinctively marked Spike's Tactical lower receiver with a complete pistol buffer system and a Davidson Defense polymer AR brace in one lower kit

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 heavy-duty hardcoat anodized black aluminum pistol buffer tube houses the buffer system at the rear of the lower, matched to the AR-15 and AR style pistol platform. The standard AR-15 carbine recoil buffer at 3 oz. and standard AR-15 carbine recoil spring made in the USA sit within the pistol buffer tube and complete the rear buffer hardware. 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 black reinforced polymer AR brace mounts directly onto the pistol buffer tube and closes out the rear end with a lightweight skeletonized design, a flat end profile, an angled support structure and reinforced bracing geometry for structural integrity, and an integrated ambidextrous QD sling socket that accepts push-button QD sling swivels for quick-detach sling attachment on either side of the brace body. The all-black finish across both the lower receiver and the Davidson Defense polymer AR brace gives this lower kit a clean and consistent exterior from receiver to brace.

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