Strike Industries M4 AR15 Lower Receiver Spring Kit 20 Piece Gunsmith Box

The Strike Industries AR-15 Lower Receiver Spring Replacement Kit includes 9 important parts that are commonly replaced or easily lost when assembling and disassembling the lower of your AR-15.

The Box includes:

• 20 x Bolt Catch Spring
• 20 x Buffer Retainer Spring
• 20 x Trigger Springs
• 20 x Hammer Spring
• 20 x Disconnector Spring
• 20 x Magazine Catch Spring
• 20 x Selector Spring
• 20 x Detent Spring