The Leupold DeltaPoint Pro red dot sight (DPP) is an open-emitter reflex sight that mounts on pistols, shotguns and rifles, and it has earned a strong reputation on all three. This model uses a 2.5 MOA red dot, the precision-friendly choice for carry and duty use. Specs: Reticle: 2.5 MOA red dot Housing: aluminum, matte black anodized Illumination: motion-activated auto-on; multiple brightness settings Top-loading CR2032 battery Aspherical lens that minimizes optical distortion Footprint: Leupold DeltaPoint Pro (an industry standard alongside RMR/RMSc) Waterproof, fogproof and shockproof; backed by Leupold's lifetime guarantee DPP vs RMR: The DeltaPoint's lens is wider front-to-back than the RMR, so the dot is slightly easier to find quickly. The DPP also has motion-activated auto-on, which the RMR lacks. The RMR is more rugged in extended duty use; the DPP is preferred where speed of pickup matters. Mounting: Many aftermarket slides offer a DPP optic cut. For Glock MOS pistols, our Nordic Components DPP plate mounts the DPP directly with backup sights included. Confirm your slide or plate is cut for the DeltaPoint Pro footprint before you order, and zero the dot at your preferred distance. DISCLAIMER: "GLOCK" is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither 3CR Tactical nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of "GLOCK" on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.