These Carlson flush mount choke tubes are constructed from 17-4 stainless steel and hardened. Lead shot can be used in all constrictions however Steel shot larger than #BB should not be used in any choke tighter than Modified (.710" diameter). BB and smaller sized steel shot may be used through full choke constriction (.700" diameter).
Specifications and Features:
Carlson's choke tube 12213
12 Gauge shotguns
Flush mount choke tube
Winchester, Browning Invector, Mossberg, Savage, and Weatherby
Note: Winchester SX2 and SX3 use Browning Invector Plus choke tube