Dual-Purpose WrenchThe gas cylinder wrench can also be used to conveniently hold the small end of the piston during cleaning. The large hole in the wrench has an internal D-shape that holds the piston from rotating without causing any damage. CNC machined and designed to fit all original USGI and most commercial gas cylinders. Powder coated in OD green.*Special Note* - Springfield Armory rifles manufactured after 2014 have oversized gas cylinders and will require an oversized wrench.
