These sporting clay style Invector-DS choke tubes are extended tubes that extend beyond the shotgun's muzzle. They use a proprietary gas seal that eliminates residue build up so that the choke tubes are easy to install and remove. Invector-DS tubes only fit shotguns that are threaded to accept them. They are not compatible with Invector-Plus or Standard choked shotguns.

Specifications and Features:
20 gauge
Extended fit
Light full
70 to 75 percent choke pattern
Nickel chrome moly alloy
Chromed finish