threaded barrel g21 gen4 and gen3 only rh
Fits: G21 Gen3 and Gen4 .578 X 28 RH .45 SAE Threaded Barrel w/Metal Thread protector (PKG) (excludes Gen5).
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Fits: G21 Gen3 and Gen4 .578 X 28 RH .45 SAE Threaded Barrel w/Metal Thread protector (PKG) (excludes Gen5).