KCI USA, Lower Parts Kit, Fits GLOCK 17, Includes Trigger, Trigger Housing with Ejector, Trigger Spring, Connector 5.5lbs, Trigger Pin, Trigger Housing Pin, Locking Block Pin, Slide Lock, Slide Lock Spring (G17/G19) (G26 Spring is Not Included), Slide Stop, Magazine Catch, Magazine Catch Spring, Does Not Include Frame, Locking Block, or Magazine