This is a civilian legal short barrel rifle (SBR). The SBR is civilian legal; however, because it is classified as a National Firearms Act (NFA) weapon, it requires registration with the BATFE.
New in box SIG556 SWAT short barreled rifle. This version has a 10" 1x7 twist barrel chambered in 5.56mm NATO. The 556 has a two-position adjustable gas valve with gas piston rotating bolt and features a rotary diopter sight and folding swiss-style stock.
SIG Item # R556-10B-S-RD