Yes of course I have a SBR tax stamp. And this isn't a pistol with an added stock.
Shooting characteristics: we haven't shot any farther than 300 yds. with it. Up to that distance it shoots the same as a 16 inch barrel.
This weapon is great as an entry gun at 22.5 inches long. Easy to manuever also.
Got about 2500 rds thru it already. No issues
http://i227.photobucket.com/albums/dd145/importkillnstang/20120728_135510.jpg
LMT, custom cut 6.5 inch barrel
Nickel boron bolt
Timney trigger 3.5lb
BCM charging handle
Eotech 512
It now has a magpul stock too