Internal or External?
Externally, do whatever the fuck you feel like doing. Magpul ALL the things if you want to. Put on a free float handguard, turn it into a SOPMOD if you want, etc. The possibilities are endless.
Internally, run it til something breaks. At most Guarder Black bucking and barrel upgrade.
Coincidentally, if you want a 20" one piece barrel for a DMR project or something check the classifieds, I'm going to post something up in the next hour or so.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE
Last edited by L473ncy; February 19th, 2013 at 22:37..