Lower Parts Kits

Spike's Enhanced Lower Parts Kit 556 - Black Better than Mil-Spec quality Five Upgrades Over Standard Parts Kit Battle Trigger Group (Nickel Boron Coated)Billet Tool-less Trigger GuardBlack Ergo GripBlack KNS Anti Rotation Gen 2 Mod 2Ambi Safety Also...

Spike's Tactical Lower Parts Kit Better than Mil-Spec quality Included Rounded Hammer (Works with ALL Calibers) and Hammer Spring Trigger and Trigger Spring Disconnector and Disconnector Spring Stainless Hammer and Trigger Pin with Black Oxide...

Strike Industries Enhanced Lower Parts Kit Enhanced Bolt Catch Strike Magazine Catch Strike Magazine Catch Button Enhanced Pivot Pin Enhanced Takedown Pin SI Selector Lever SI Selector End Plate SI 60-90 degree 3-in-1 Selector Shaft