New complete .223 caliber Sig 556 Patrol upper receiver assembly with short gas piston system, 16 in. 1/7” twist barrel, and factory fitted bolt carrier as shown. This is a new unfired upper receiver take-off from a Sig factory 556 Patrol Rifle. Note that this is a serial number part and must transfer to a FFL as a firearm. No sales to CA residents or where prohibited by law. AZ residents must pay 9.1% sales tax.
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