V4 GLOCK MOS to Holosun 407k / 507k


(1 customer review)

What is the V4 Series of Adapter Plates and Why?
The CHPWS V4 Series of adapter plates has evolved over the past five years because the OEM mounting plates are the weakest link in the Red Dot System.
The new V4 Series address two specific areas in the Red Dot Mounting:
Mounting Hardware
Optic & Lens Protection (Defender Series)
All new V4 plates will feature our Patent Pending replaceable stainless steel T-Nuts and stainless steel Torx® head screws which are used to mount the RDS (Red Dot System) to the V4 plate giving you the ability to replace the mounting hardware without replacing the entire plate.
The V4 Series retains its industry leading six to seven full revolutions of thread engagement for maximum retention.


6061 Aluminum Plate
Type III MIL-Spec Hard Anodize Coating
Qty 2 – 416 Stainless steel T-Posts
Qty 2 – Torx Head Screws
Qty 2 – M3 Screws
Single Use Pack of VibraTite VC-3
*The V4 MIL/LEO eliminates the requirement of the RMR Sealing Plate but it can be used if you are required to use one by policy.
In the coming weeks we will reveal our V4 Upgrade Program.  Any current V1, V2, or V3 customer will be eligible to send in his or her old plate and upgrade to your choice of new V4 Adapter plate for a nominal charge (about $30 to $35 dollars).  We want all clients to have the option to upgrade to the latest and greatest hardware.
Join the #boomsquad today and don’t risk becoming a One Eyed Pirate!  Errrr

Additional information

Weight .2 lbs
Dimensions .5 × 4 × 6 in


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1 review for V4 GLOCK MOS to Holosun 407k / 507k

  1. Brandon Meadows (verified owner)

    Received my adapter and it fit the Holosun 507k beautifully. I honestly didn’t think it fit at first, but it was a tight enough fit that I actually had to apply a touch of pressure for it to drop into place. Beautiful fit, no gap, etc.

    I was so excited by this that I got everything ready, got the VibraTight on the screws let it dry per its instructions, and mounted the plate. It fit amazing and was secure. I put the 507K on and started getting the screws in… that’s when I ran into an issue… The (2) 4-40 screws going through the 507k to plate (through the t-posts) ended up being about 4 threads too long, so before the site was secure the plate was being bent up due to the screws bottoming out.

    The result, disassemble everything, use the t-post as a gauge, and spend about 8 min sanding the screws down to the correct length, then re VibraTight the screws, and re-mount. After the custom length screws, it now is all mounted, and looking good. (I don’t see an option to upload an image.)

    I haven’t field-tested or anything at this point but felt I needed to give a review for the quality. I’ll gladly update or re-review after 6 or so months of use.

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