The 6378RDSC Concealment Paddle Holster is designed to fit handguns with red dot optics and small format lights while maintaining the smallest footprint possible. It features the ALS® (Automatic Locking System) retention, an internal locking device that secures the firearm in all directions simply upon reholstering. This ergonomic design features a straight-up draw, and the release is completely operable with the thumb, making it very instinctive to use. SafariLaminate™ construction makes the holster strong on the outside, while the interior suede lining protects your firearm’s front sight and finish. ** Safariland® cannot guarantee that RDS holsters will be compatible with non-factory (Glock MOS, M&P CORE, etc.) mounted red dots.  Numerous variables including depth of RDS into slide, use of dovetail, placement on slide, etc. can all affect the fit of the holster.