SPECIFICATIONS

Magnification: ≤6

Type: handgun

Tactical RMR Red Dot Reflex Sight Holographic Scope 3.25 MOA fit 20mm Picatinny Mount Glock 17 19 Adjustable Reflex Sight

-Model:RMR Red Dot Sight

-Battery: 1*CR2032 (Not Included)

- Function:Red Dot

- Material:Aluminum Alloy

- Magnification:1x

- ParallaX Setting: ≤3'

- Pattern:3.25 MOA Dot

-Mounting:Glock Mount, 20mm Picatinny

- Adjustment:100 yards (clicks/in) 1.0

not only has one Mount for 20mm picatinny rail,but also has one glock mount. But the glock mount is not fit all Glock gun. Measure the size of your GLOCK screw hole and ensure that the RMR Glock Mount matches your Glock perfectly. If your gun has trapezoidal slot,this glock mount do not fit for your gun. You need one Universal Mount .