Spike's Tactical Calico Jack Pistol Lower Build Kit, SBA4 Adjustable Stabilizing Brace

Spike's Tactical Calico Jack Pistol Lower Build Kit, SB Tactical SBA4 Adjustable Pistol Stabilizing 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 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. An SB Tactical SBA4 adjustable pistol stabilizing brace in black reinforced polymer with an adjustable length of pull and an integrated 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
• 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
• SB Tactical SBA4 adjustable pistol stabilizing brace, black, reinforced polymer, adjustable, integrated QD sling socket, Mil-Spec carbine buffer tube compatible

Perfect For

• AR-15 pistol builders sourcing a complete lower build kit on the Spike's Tactical Calico Jack receiver with an SB Tactical SBA4 brace included
• Shooters pairing this kit with an existing upper assembly who want a Calico Jack lower and an SBA4 adjustable brace with an integrated QD sling socket covered in one package
• Builders who want a distinctively marked Spike's Tactical lower receiver with a complete Mil-Spec buffer system and an SBA4 adjustable 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 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 SB Tactical SBA4 adjustable pistol stabilizing brace in black reinforced polymer fits over the Mil-Spec 6-position carbine buffer tube and closes out the rear end with an adjustable length of pull and an integrated QD sling socket for quick-detach sling attachment built directly into the brace body. The all-black finish across both the lower receiver and the SBA4 brace gives this lower kit a clean and consistent exterior from receiver to brace.

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