Cheek Piece Detent for R-310 and R-410 Stock Assemblies. Solid brass, designed to be used in place of the M5 cheek piece screw.
Second image shows stock adapter without screw or detent. Third picture shows stock adapter with detent correctly installed on the right side. A drop of LOCTITE® 243 "Blue" is recommended in the threads. The cheek piece snaps over the R-429 securily.
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