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The Aero Precision PRO 5.56 Bolt Carrier Group is built from the ground up to meet the demands of the most extreme conditions. Each component and manufacturing process of the PRO 5.56 Bolt Carrier Group was deliberately chosen to increase the reliable...

The Schmid Tool 90-degree safety selector is compatible with mil-spec, M4E1, and M5 lower receivers. Ambidextrous safety levers for both sides of the lower receiver allowing manipulation with ambidextrous levers for both left and right-handed shooting...

AR15 Takedown Pin Detent (2) Takedown Pin Spring (2) Roll Pin, Fwd Assist (2) Bolt Catch Spring (2) Bolt Catch Buffer Bolt Catch Roll Pin (2) Trigger/Hammer Pin Safety Selector Spring Safety Selector Detent Buffer Retainer Buffer Retainer Spring...