Yeah I've got a PRI gasbuster handle
I don't see how an adjustable gas block can get knocked if you have a low-pro one under your free float tube/rail. Probably beneficial for accuracy considering they'll reduce the impulse of the reciprocating mass of the buffer/BCG. Other option is a heavier buffer I guess, except you can't get a heavier rifle buffer as far as I know and no-one (except me!) has carbine length stocks on A, just A2 and various monstrosities (B&C thumbhole etc)
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