V Seven Ultra Light S7 Tool Steel Bolt Catch Black For Ar15/5.56. 56x45mm NATO Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Condition: New Features: Recommended For Ar-15 Only Super Tough S7 Tool Steel Available In Ionbond Black & Np3 Finishes Mil-Spec Compatibility Easy Drop In Design Weighs Approx. 9 Grams Package Contents: V Seven Ultra Light S7 Tool Steel Bolt Catch What firearm models does the manufacturer say V Seven Ultra Light S7 Tool Steel Bolt Catch is compatible with? The manufacturer suggests that V Seven Ultra Light S7 Tool Steel Bolt Catch is compatible with AR-15V Seven ULBC-S7-BLK: Ultra Light S7 Tool Steel Bolt Catch Black For Ar15/5.56