1st Gen SIG Rattler upper in .300 Blackout. This is the original 5.5" barrel that does NOT have issues bending. Never fired; NIB.
Also comes with conversion kit for your AR15 lower. You do not need a SIG lower to match with this upper. You can use any AR15 lower. Good item to quickly and in a cost-effective manner convert your existing M4/AR15 into a backpack gun.
Asking $1200 firm. Originally purchased for $1500. Txt: Two-1-four, 406, eight-0-six-1