The Doublestar AR-15 lower parts kit gives you the parts to finish a stripped AR-15 lower for a 5.56 NATO build. Doublestar sources American-made components for the kit, and the fire control group is the centerpiece.

The trigger, hammer and disconnector are made from mil-spec, heat-treated 8620 steel. Every touch point is finished for a smooth, crisp trigger pull with minimal creep or drag, so the kit runs well as a standard rifle trigger without extra fitting or polishing.

Features:

• Mil-spec heat-treated 8620 steel fire control group
• Trigger, hammer and disconnector finished on all touch points
• Crisp trigger pull with minimal creep or drag
• Coiled steel spring pins
• Extra takedown detent and spring included
• American-made parts

Good to know: The extra takedown detent and spring cover the part most often lost during a first lower build, so you can keep going if one gets away from you. The kit fits standard mil-spec AR-15 lower receivers.

Before you build: Confirm your lower is mil-spec AR-15 pattern. After assembly, function-check the safety, trigger reset and hammer before live fire.