Will it allow factory 9mm Colt bolt lock back with bolt hold open? Kynshot heavy 9mm hydraulic buffer mention it will but this version doesn’t say!

Question

KynSHOT · Accepted Answer

Yes it will, however, in order to use the RB5020SS, you will need to use an A5 buffer tube with a .308 carbine spring and a spacer.

Will it allow factory 9mm Colt bolt lock back with bolt hold open? Kynshot heavy 9mm hydraulic buffer mention it will but this version doesn’t say! — 1 Answer