This tube fits the following guns:
Browning 12ga 525/625 Citori
Browning 12ga BPS
Browning 12ga BT-99 
Browning 12ga Cynergy
Browning 12ga Gold
Browning 12ga Maxus
Browning 12ga Silver
Ithaca 12ga Model 37 Plus
Marocchi 12ga Golden Snipe Field O/U
Sako/Tikka 12ga 
Winchester 12ga Model 101
Winchester 12ga Select 
Winchester 12ga Super X2
Winchester 12ga Super X2, Super X3
Winchester 12ga Super X4, SX4
Winchester 12ga Supreme
Winchester 12ga SXP
 
12ga Browning Invector Plus/Winchester SX3, SX4 Black Cloud Full
 
Patternmaster Black Cloud FULL Choke is a constriction choke that is compatible with the Black Cloud Ammunition or any ammunition with a "Flight Control" wad. It has also proven to shoot well with other brands of shotgun ammunition as well. Patternmaster worked closely with Federal Premium® Ammunition company to design a tube that enhances their “flite control” wad inside Black Cloud and Prairie Storm ammunition. The design of Patternmaster’s Black Cloud tubes enables the use a Full constriction choke with steel shot because the tightest portion of constriction is located outside the barrel.  Expect full patterns with an effective range from 30 to 60 yards.
Note: Testing done by Ballistics Performance has determined that ammunition with velocity of 1550fps and below will achieve the best results with Patternmaster Tubes. Ammunition containing flight control wads may not perform using a shotgun with a ported barrel.
Not for use with slug ammunition.
Patternmaster's 12ga Browning Invector Plus/Win SX2, SX3 will interchange with Browning Gold, Silver, Maxus, 2012 Citori & Cynergy, BPS; Winchester SX2, SX3, Supreme and Select Energy; and Marrochi Golden Snip Field O/U. For more information regarding the interchange please consult the firearm manufacturer.