The spear LT muzzle device comes off relatively easy... put the muzzle down in a pot of boiling water for 5 min, and it comes right off. I saw it on a youtube video so I could put my Sandman S on my 11.5. Great video by the way!
The 4” drop,is not because of the gun, it’s because you sighted the gun with 110 gr ammo and shot with 220 gr ammo. It’s twice the weight and will drop much faster on target
You are absolutely correct. Furthermore, the 220 gr has less than half the velocity of the 110 gr rounds. The AR15 with the 10.3" barrel was sighted in with the exact same ammunition and the 220 gr ammo only dropped 1 1/2" that is quite a bit of difference between the two guns. I expected a drop, but I was really surprised at the difference between the two guns.