Shop our Discount Mil-Spec Lower Build Kit here!

This kit is a true bargain. All of the Mil-Spec components you need to finish your lower receiver.

OEM 5.56/.223 Lower Parts Kit includes:

Bolt Catch, Bolt Catch Plunger, Bolt Catch Roll Pin, Bolt Catch spring Buffer, Retainer, Buffer Retainer spring Disconnect, Disconnect spring Hammer (black or silver in color), Hammer Pin, Hammer spring Magazine Catch, Magazine Catch Button, Magazine Catch spring Pistol Grip (A2 style), Pistol Grip Lock Washer, Pistol Grip Screw, Pivot Pin, Pivot Pin Detent, Pivot Pin Detent spring Selector, Selector Detent, Selector Detent spring Takedown Pin, Takedown Pin Detent, Takedown Pin, Detent spring Trigger (black or silver in color), Trigger Guard, Trigger Guard Roll Pin, Trigger Pin, Trigger Spring

M4 Style Collapsible Stock

These stocks come from multiple manufacturers. Therefore, the style may differ from batch to batch, which can result in differences including: not having a buttpad or having a QD mount, among other variations.

Mil-Spec Carbine Receiver Extension / Buffer Kit

Take a look at our other AR-15 Parts here!