Upper has less than 30 rds. down the pipe. Barrel nut has been torqued to 75 lbs. and aero shell grease was used.
-Spikes Tactical Upper receiver
-16" carbine length M4 profile 1:7 twist (non-chrome lined)
-Troy Industries .750 lo pro gas block
-standard barrel nut
-A2 flash hider
-YHM gas tube
Asking $290 shipped
Paypal gift/3% or USPS MO
email or IM works.