Attaching the barrel, gas block, gas tube the wrong way ’round. I discovered too late the handguard trunnion / barrel nut must go on before the gas tube and block. Skip ahead to the next video for installing the handguard. Also look for another video on installing the muzzle device, bolt carrier group, charging handle, picatinny m-lok rails, and sights.
This is the second video in my AR build log series.
BoM:
VLTOR MUR (Modular Upper Receiver)
ADM Pencil Barrel (16″ Criterion pencil barrel with nitride finish)
Coda Evolution Lightning carbon fiber handguard (15″ cahbon fibah)
Brownells titanium bolt carrier group (black DLC finish)
Radian Raptor-LT charging handle (because I’m basic)
Arisaka low profile picatinny rail (for M-lok slots)
Scalarworks Peak ironsights (fixed)
Surefire Warcomp (because tacticool)
