I'm not sure which model HALO shooter521 has, but I've used my 2.0 with his and it worked just fine.
ok that answers my question cause I go mine around same time he did
Hey Shooter, would you measure how much OAL the Halo adds to the rifle when used on the BC?
IIRC the top is a 14.5" barrel with pinned flash hider.
You don't RC. Top rifle is a 16" barrel with a Smith DC Comp (same OAL as their Vortex flash hider).