I've been reading up on the gun I plan on getting, the GPR. I've read where the length of pull (I think that's what it's called) is 14", which fits people around 5'10"and taller. Well I'm only 5'7", will this be a issue? I haven't gotten to a store where I can hold it and get a feel for how it mounts up yet. Does anyone around my height shoot a GPR? Could I have the stock shortened if it's too long?