This is a genuine Target Sports 12 gauge choke tube in a Cylinder bore constriction, finished in blue and built as a flush-fit tube for a clean profile at the muzzle. Cylinder choke is the most open constriction available, essentially matching the bore diameter of the barrel itself, which produces the widest possible shot pattern at close range. That makes it the go-to choice for home defense shotguns, close-range turkey hunting with certain loads, breaching applications, and shooting specialty ammunition like rifled slugs or less-lethal rounds that perform best without any choke constriction squeezing them. Like the rest of this Target Sports line, this tube uses the widely adopted Invector-style flush-fit thread pattern, giving it broad compatibility across many popular shotgun platforms. It fits the Browning Standard Invector system, CVA, FN America's SLP/SLP MK1/P-12, H&R 1871 and Pardner Pump models, Ithaca 37 and 87, Miroku, the extensive Mossberg 500/510/535/590A/930/940/1000/5000/9200 and Maverick 88 lineup, Pedersoli, several Stevens models, Stoeger over/under and side-by-side shotguns, Winchester's Standard Invector series, Weatherby's Athena/Centurion/Element SA/Orion/SA 459, and New England Firearms shotguns. Whether you're setting up a dedicated home defense gun, shooting slugs that perform best with no constriction, or simply want the widest possible pattern for a specific application, this Cylinder choke tube covers that need. CMJ Supply and More ships this Target Sports 12 gauge Cylinder flush-fit choke tube brand new.