BRN-180® SPRING KIT Reviews & Ratings

Replacement or Backup Spring Kit for the BRN-180® Upper Receiver. Includes essential Springs. Gen1 and Gen2.

2x Recoil Springs
1x Bolt Return Spring
1x Piston Drive Rod Spring

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Bought some extras

I bought some extras to just have but recently sent in the upper for warranty and it seems they have changed the springs out for stronger ones. Have anyone tried them and are they up to the spec need to fully cycle the bolt?