Here is a few bits of info:
- It's new. less than 300 rounds.
- It's clean. Detailed strip and clean.
- It's an SBR. 7 inch. LOUD.
- It was well lubed. Even over-lubed eventually
- Ammo was new and consistent.
My theory is that the buffer spring is too strong because the barrel is so short and the recoil is so light.
Any other ideas?
--Yes I assembled the thing myself? What are you saying!?