5.7 x 28MM

For FN Herstal

FN 5.7 Spring Repair Kit

For Ruger

Ruger 57 Threaded M10x1.0 Barrel with 1/2x28 Adaptor

+ 10 reviews

For FN Herstal

FN 5.7 Threaded Barrel M10x1.0 RH with 1/2x28 adapter

+ 4 reviews