JK Armament JK 195 20Ga Choke End Cap Improved Cylinder Black. They're the only shotgun suppressors that wont hold you back when a tight shot pattern is required such as with skeet trap and bird hunting. Full choke is for lead birdshot only (NO STEEL BUCKSHOT or SLUGS) Specifications for JK Armament JK 195 20Ga Choke End Cap: Manufacturer: JK Armament Color: Black Finish: Type 3 Hard Anodize Diameter: 1.95 in JK Armament JK195LTECCF 195 Choke End Caps Full JK Armament JK195LTECCIC: JK 195 20Ga Choke End Cap Improved Cylinder Black