Built for clay target sports. The Clay Burner Extended is long on length and even longer on performance. With an extended design and a proprietary differential banded brass gas seal, the Clay Burner is easy to remove and install. Scaled in 0.005” increments of constriction, there's a Clay Burner choke tube with the constriction you need to adapt to any target presentation. Invector-DS tubes fit only Browning shotguns designed for Invector-DS and are not for use in shotguns showing Invector-Plus or Standard Invector on barrel(s).