Sig Sauer Electro-Optics SORM1710 Romeo-M17 Enclosed Black 1 X 24 mm 2 MOA Red Dot/32 MOA Circle Multi Reticle The M17 And M18 Pistols Have Been Selected By The US Military as The Official Sidearm, And The Romeo-M17 Is The Only Optic That Is Truly Designed Specifically For This Pistol. All Other Optics Have Many disadvantages And Make Several compromises. The Romeo-M17 Does Not. This Is An American-Built Mil-Spec Red Dot Truly Worthy Of The Sig Sauer Name. *Please Note - The Romeo-M17 Pistol Red Dot Sight Utilizes Sig SAUER'S Proprietary Sig-LOC Mounting Interface And Only Fits Sig Sauer M17/M18 Military Issue, And Commemorative Pistols With a Single Optics Plate Mounting Screw. This Sight Will Not Fit Any Other Pistols. Magnification: 1X Objective: 24mm Dot Size: 2 MOA/32 MOA Length: 2.40" Weight: 1.50 Oz Battery Size: Cr2032 Reticle: 2 MOA Red Dot/32 MOA Circle Adjustment Size: 1.50 MOA Proofs: Waterproof Optic Coating: D.A.R.C./LensArmor/SpectraCoat Windage Elevation: Adjustable