Gun Mounting Details
The Holosun K series (407k and 507k) are “micro” red dots intended to be mounted to compact handguns like the Sig P365, Glock 43X/48 MOS, and the Springfield Hellcat.
These red dots have the Holosun K series footprint. This footprint is similar to the RMS (or shield) footprint; however, the rear posts (or recoil lugs) have been removed and the front posts are shorter. Some handguns like the Sig P365 are compatible with the “K” footprint. Others like the Springfield Hellcat are not and require an adapter plate as noted below.
This red dot will fit:
- Sig P365 (all models)
- Glock 43X/48 MOS requires this adapter plate
- S&W M&P Shield Plus requires this adapter plate
- Springfield Hellcat requires this adapter plate
- Ruger Max-9
- FN Reflex MRD
- PSA Dagger
- S&W Equalizer
See our full Holosun 407K & 507K Red Dot Mounting Guide for more details.