Does anyone know if a JP 9mm bolt is compatible with a Gibbz side charging upper? I've got a QC10 SBR that I can't quite get the BHO/Spring/buffer 100% perfect, so I'll probably take it off,and convert to a side charged upper.
Posted: 5/1/2015 10:08:39 PM EDT
[#1]
I have seen a couple pics with their uppers and 9mm.
