Originally Posted by
cj5_dude
Ok, there's a few things going on here.
First if you want to build an SBR with a 10.5 inch barrel, or any rifle with a barrel under 16 inches, you need to fill out some ATF forms and mail a $200 check to the ATF. There are a lot of threads on making an SBR on this board so take the time to read them.
With that said, if you currently own a rifle with a 14.5 inch barrel with a removable muzzle device then you have an illegal SBR. So it would be in your best interest to blind pin and weld that favorite muzzle device on so you don't run afoul of the local law enforcement and ATF.
I think you seem to have some confusion that if you just screw on something that makes the barre overall length over 16 inches it's ok but it's not. If you can unthread something and make the barrel under 16 inches then it needs to have SBR paperwork with it.
Does that make sense?