Mercury-Filled, Controls Recoil, Increases Comfort
Fits a wide selection of rifles and shotguns. Compact size fits in buttstocks or magazine tubes. Special screw allows fitting to forearm caps on most shotguns. Requires drilling a 5⁄16" hole in cap. Nicely blued and polished to match the finish on most guns.
Big Book Catalog, Issue:66, Page:433
New Product Supplement, Issue:581, Page:005
SPECS: 3" (7.6cm) long, .840" (21mm) dia. 8 oz. (227 g) weight.