UtahLeftyGunner
Amateur
I snagged a Glock 43x MOS a few months ago with the intention of mounting a Holosun 507K. The Glock MOS is setup for the RMSC, and while the 507k shares a similar footprint, the 507k does not have the recesses in the rear for the posts, and the front recesses are shorter than the Glock posts. (.029 vs .040 for this particular 507k/Glock combo)
I am aware of the CHPWS adaptor plates that allow the 507k to be mounted to the Glock MOS, but if i modified the slide then I could use the factory height sights and it’s a direct mount vs the added variable of having a plate. So today I set up the Bridgeport mill and removed the rear posts completely, shortened the front posts to the correct height, and now it’s a perfect fit.
I am aware of the CHPWS adaptor plates that allow the 507k to be mounted to the Glock MOS, but if i modified the slide then I could use the factory height sights and it’s a direct mount vs the added variable of having a plate. So today I set up the Bridgeport mill and removed the rear posts completely, shortened the front posts to the correct height, and now it’s a perfect fit.