The PAMAX Tactical AR-15 lower Receiver spring replacement kit includes 9 important springs that are commonly replaced or easily lost when building stripped AR-15 lower receivers. The 9-Piece kit includes springs for the bolt catch, disconnector, buffer retainer, trigger, hammer, magazine catch, selector, and two detents. Package include:- 1 x Bolt Catch Spring- 1 x Buffer Retainer Spring- 1 x Trigger Spring- 1 x Hammer Spring- 1 x Disconnector Spring- 1 x Magazine Catch Spring- 1 x Selector Spring- 2 x Detent Spring

AR15 M4 Lower Receiver 9-Piece Spring Kit