Franklin Armory DFM Bolt Catch With Roll Pin Black. With these AR15 Magazine Catches & Releases by Franklin Armory you'll be able to easily install DFM magazines in an instant. Equipping your rifle with a Franklin Armory DFM Bolt Catch 5554 Gun Type will hold the bolt open after emptying a mag which greatly speeds up the reloading process. The Franklin Armory DFM Bolt Catch w/ Roll Pin is the perfect addition for any gun owner who's seeking a bolt catch without the protrusion for the follower. Specifications for Franklin Armory DFM AR-15 Bolt Catch: Manufacturer: Franklin Armory Gun Model: AR-15 Finish: Black Gun Type: Rifle Package Contents: Franklin Armory DFM AR-15 Bolt Catch 5554 What firearm models does the manufacturer say Franklin Armory DFM AR-15 Bolt Catch is compatible with? The manufacturer says that Franklin Armory DFM AR-15 Bolt Catch is compatible with AR-15Franklin Armory 00-50051-BLK: DFM Bolt Catch With Roll Pin Black