I have a complete upper receiver build with around 300 rounds on it and was extremely accurate. It would consistently print sub moa 5 shot groups with 69, 75 and 77 grain ammo. Never had a failure of any kind. I did have the BCM handguard cut back a little on the sides to allow it to be run with a suppressor. The barrel is a Rainier Ultra Match Mod 2 barrel and they are amazing. I own 3 and all of them are crazy accurate. Parts listed below
$750 shipped / No trades
Aero FDE upper
Geissele Airborne charging handle DDC
KAK K Spec down vent BCG in FDE
Rainier Ultra Match Mod 2 barrel - 13.9", 1/7.5 twist, fluted, nitride, mid length. These barrels come with a SUB MOA guarantee from Rainier
Superlative Arms adjustable gas block in FDE
BCM MCMR FDE 13" handguard
$750 shipped / No trades
Aero FDE upper
Geissele Airborne charging handle DDC
KAK K Spec down vent BCG in FDE
Rainier Ultra Match Mod 2 barrel - 13.9", 1/7.5 twist, fluted, nitride, mid length. These barrels come with a SUB MOA guarantee from Rainier
Superlative Arms adjustable gas block in FDE
BCM MCMR FDE 13" handguard
