Spikes Tactical Standard Lower Parts Kit Fire Control Group/Trigger Black. The kit we came up with exceeds Military Specifications by a long shot while also offering a much better fit and finish Specifications for Spikes Tactical Standard Lower Parts Kit: Manufacturer: Spikes Tactical Color: Black Included Accessories: Aluminum Trigger Guard/Spring Loaded Detent/Roll Pin Safety Selector/Detent/Spring Spike's Pro Grip Buffer Retainer Spring/Plunger Front Pivot/Rear Takedown Pin/Detent/Springs Magazine Catch/Spring/Button Bolt Catch/Spring/Roll Pin/Plunger Condition: New Country of Origin: USA Package Contents: Spikes Tactical Standard Lower Parts Kit Spikes Tactical SLPK101: Standard Lower Parts Kit Fire Control Group/Trigger Black