GLOCK 43X / 48 MOS to Holosun 407k / 507k Adapter Plate


This adapter plate is made specifically for the Glock 43X / 48 MOS with the RMSc optic cut to mount a Holosun 407K / Holosun 507K.

Hardware Included.

No need to modify existing recoil posts on the slide when using this adapter plate.

(3 customer reviews)


Qty 1 – Adapter Plate

Qty 2 – 18-8 Stainless Steel Torx Head Screws

Qty 1 – Single Use Pack of VC3

Thickness .045”

Material 6061 Aluminum

Coating Hard Anodized, Type III

Finish Matte Black

If you’d prefer to have CHPWS mill the posts off your G43x MOS / G48 MOS to allow the 407k / 507k to be directly mounted without an adapter plate,


Additional information





3 reviews for GLOCK 43X / 48 MOS to Holosun 407k / 507k Adapter Plate

  1. eliasrahal (verified owner)

    Great plate clean cut ,have in front small pin need it for glock 43x mos or48x mos to install holosun 507 kx2 come with 2,sliver screws wish they was black ,don’t use holosun screws to long will touch ur plunger extractor causing malfunction to eject. Use Chpws sliver one I forget I reviewed In 2 days super fast

  2. M24 (verified owner)

    Very nice product. It arrived in good order, nicely packaged, etc. Installation was a breeze. I did use my own blue loctite as I prefer it over vibra tite. I have not shot the pistol with the optic installed yet, but will be out on the range to zero the optic soon. I will check my witness marks, which I was glad to see were part of the instructions -a good practice everyone should know about, it saves heartburn later from serious unexpected failures. The ONLY reason I did not give the product 5 stars, which in terms of quality, it certainly deserves, is because it was $60.00 shipped. I did opt for the extra bits, just for the heck of it, but even with that, the asking price is steep given that the optic was $280.00. I think that the price is high by $25 or so, but with that said, I would pop for another if I needed one.

  3. archerbell (verified owner)

    Perfect fit for my 43X MOS, not only the adapter plate, but the mounting screws are the perfect length. I originally tried the screws that came with the sight and they were too long. This interferes with your extraction and your pistol will be unreliable. It would look better if the screws were black instead of silver but I guess that would be nit picking.
    After correcting the mounting screws I proceeded to adjust the sight. This was a new pistol and I was using the Shield Arms S15 magazines. I ran 50 rounds of ammunition through the pistol to make sure everything worked together. It did and I feel that the pistol is reliable enough to carry.
    My original order was improperly filled and I got a plate for a full size Glock. A phone call to customer service set in motion an exchange process that resulted in the proper mounting plate arriving four days later. I had to make an unplanned trip to the UPS Store. Fortunately there is a UPS Store about ten miles away. I was able to print out a return authorization label that was prepaid, so I was just out of time and expense of getting the return dropped off.
    I am seriously considering having my H&K VP9 milled by CHPWS. I have confidence that the work will be satisfactory if not outstanding.

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