I picked up used 70's Browning O/IU at a good price to use as a field gun but it had 30" barrels with fixed chokes (Mod and Improved Mod) that also had some marks on the end of the barrels. Sent it into Briley's to have it shortened by 2" and have screw in choke tubes installed (they offered a 5 pack option and you get to pick em). Got a call yesterday that it was already being shipped back with the work completed after only having it 5 days! Had read online sometimes this would take weeks to months...so pleasantly surprised with the fast turn around.