Brand new low-profile gas block from Aero, .750 size, nice nitride finish, never opened. $40 obo, just want to get my money back out and you dont have to wait and pay for shipping.
Brand new 18in., heavy profile, rifle length gas system, m4 feedramps, cmv nitrided barrel for sale. Also have a brand new aero low-pro, nitride gas black I can throw in for an extra 30 bucks. Great barrel, never shot, just going a different direction with the build.