Hey all, I have an Echo 1 Stag 15 that's seen better days. currently missing the little latch to secure the charging handle, no carry handle and kwa gen one lower. One of the screws in the pistol grip keeps on spinning, its probably stripped. it doesn't impede its function though. As of right...

I have a kwa sr10, I've been looking to turn it into a DMR, I only need a couple of things but some are a mystery to me. First my bucking is torn, so what bucking will give me good range. Also are 6.03 barrels good for DMRs? Or should u go bigger? And finally what fps should I have? I'm going to...