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Holosun Sub-compact HS407K-X2 1x 6 MOA Dot Red Dot Sights
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Mi-plinker's Review of Holosun Sub-compact HS407K-X2 1x 6 MOA Dot Red Dot Sights
The Interference: Standard RMSc front posts are roughly 0.040 inches tall. However, popular modified-RMSc optics—specifically the Holosun K-Series (407K/507K/EPS)—feature front recesses that are only 0.029 inches deep.The Result: Attempting to mount a K-series optic directly onto standard RMSc hubs leaves an 0.011-inch gap of interference. The optic will ride high and fail to sit flush unless the front pins on the plate are shaved down or an ultra-thin spacer plate is used.
I wasn’t aware of this and couldn’t sight the optic in. Then noticed it wasn’t sitting flush. I had to file down the nubs on the slide plate. Note also, the windage and elevation adjustments increments aren’t crisp, and adjusting to a specific number of moa is not easy. But I’m happy w the 6 moa dot for a pistol. It’s a small window and finding the dot in a rush would be really challenging if it were the smaller.
I wasn’t aware of this and couldn’t sight the optic in. Then noticed it wasn’t sitting flush. I had to file down the nubs on the slide plate. Note also, the windage and elevation adjustments increments aren’t crisp, and adjusting to a specific number of moa is not easy. But I’m happy w the 6 moa dot for a pistol. It’s a small window and finding the dot in a rush would be really challenging if it were the smaller.
Pros:
- smaler size is perfect for CC or a pistol w a narrow width. rmr width hung out past the slide on my Arex.
Cons:
- None
Would Recommend:
Yes