Harris Engineering No.4 Adapter- Barrel Clamp
The NO.4 adapter requires 2 inches of uncluttered barrel for mounting. Fits barrels from .550 inch diameter to .812. Best application is on single shot pistols. It requires 6 inch or longer barrel. The hinged mounting bracket allows bipod legs to fold backward. Not recommended for shoulder guns. Mounting bipods on rifle barrels may affect accuracy. Wt. 3 oz.