Description
The Ruger 90431 Stock Module is a replacement comb insert for Ruger American Rimfire rifles using the company’s Modular Stock System. Molded from durable black synthetic with a subtly textured surface, this module lets the shooter adjust comb height and length of pull on an existing stock without modification.
This is the Low Comb / Standard LOP configuration, with a 1.26″ comb height and a 13.75″ length of pull. The reduced comb height places the shooter’s eye naturally in line with standard iron sights, making this the right pick for traditionally-sighted American Rimfire rifles.
Sold as a customization component only, the 90431 is a comb module, not a complete buttstock assembly. It installs into the Ruger American Rimfire’s modular stock to refine comb height and sight alignment.
