If you have ever lost a spring or a detent when assembling or working on your AR15 receiver, this kit has one of each spring and each detent to replace each one in your AR15 lower. 

Kit includes:

 1x Selector Detent

 1x Selector Spring

 2x Takedown Detent

 2x Takedown Detent Spring

 1x Buffer Detent - AR15 / M16

 1x Buffer Detent Spring - AR15 / M16

 1x Bolt Catch Detent - AR15 / M16

 1x Bolt Catch Spring - AR15 / M16

 1x Magazine Catch Spring - AR15 / M16