This lower build kit combines a Spikes. Tactical. Calico. Jack stripped lower receiver with a complete set of components for AR-15 assembly. The kit includes a mil-spec heavy-duty buffer tube, six-position M4-style buttstock, lower parts kit, and all necessary hardware for lower receiver completion. Everything you need is included except the upper receiver and bolt carrier group.
The. Calico. Jack lower receiver from. Spikes. Tactical is known for precision machining and tight tolerances. This stripped receiver provides the foundation for a complete lower assembly. The serrated controls and quality finish ensure reliable operation across extended shooting sessions.
This kit includes everything needed to finish the lower receiver assembly. The mil-spec buffer tube, buttstock, and lower parts kit work together as a matched system. All components are manufactured to standard AR-15 specifications for reliable function and durability.
Every component in this kit meets or exceeds mil-spec standards for AR-15 platforms. The heavy-duty buffer tube is designed to handle full-power rifle cartridges. The M4-style buttstock provides comfortable shooting position and allows quick adjustment for different shooters.
Upper receiver not included. Bolt carrier group not included. You will need to source these components separately to complete a functional rifle.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Verify all components are compatible before assembly. Use only quality ammunition appropriate for your completed rifle.
Brand: Spike Tactical
Product: Spikes Tactical Calico Jack Lower, Buffer tube kit, Omega AR-15/M16 Stock, LPK, Lower build kit
Platform: AR-15
Color: Black
Pistol Brace / Stock: AR-15/M16 Carbine MIL-SPEC 6 Position Buttstock, Black, M4 Style, M4 Stock
Component: SPIKES CALICO JACK STRIPPED LOWER RECEIVER (Qty 1)
Parts Kit: Complete Mil-Spec AR-15 Lower Parts Kit
Other Parts): Mil-Spec Heavy-Duty AR-15 6-Position Buffer Tube ONLY (No Other Parts)
3 Oz.: AR-15 Standard Carbine Recoil Buffer - 3 oz.
End Plate: AR-15 M16 Mil-Spec Receiver End Plate
Castle Nut: AR-15 Carbine Castle Nut
The Usa: Standard AR-15 Carbine Recoil Spring - Made In The USA
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