**SPF** Installed on a build but never shot. Started as a 12.5" and was cut to 10.3". Same exact barrel here: https://www.cmmginc.com/shop/barrel-sub-assm-12-5-mr-4140cm-sbn-5-56mm/ Will come with gas block and gas tube. Minus $20 if you don't want the block and tube. $160 FTF in the Parkose/Gateway area of Portland or at the Kaiser Sunnyside Hospital campus between 9am-4:30pm m-f.