American Tactical Imports Cavalry SX Over/Under Shotgun, 20 Gauge, 26" Barrel, 3" Chamber, Turkish Walnut Stock, Engraved Finish. The Cavalry SX has a blued 4140 chrome moly steel barrel which is chrome-plated inside and outside, five interchangeable chokes (C,IC,M,IM,F) and a brass front bead sight. It has a 3" chamber and a single selective trigger. The beautiful Turkish walnut stock and forearm sport an oil finish. This shotgun comes with an engraved receiver.