The Strike Industries 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.
Specifications:

Type	Spring Kit
Model	AR-15
Dimensions
Size	Mil-Spec
Material	Metal
Action
Trigger
Safety
Thread Pattern
Finish	Black
Bolt Type
Hand
Hammer Type
Max Capacity