Hammers 3-9x40AO Air Rifle Scope with One-Piece Mount -Variable 3x-9x power and 40mm parallex adjustable objective. -MilDot reticle. -Standard 1inch one-piece main tube. -Fingertight windage/elevation adjustments. -Internally reinforced to stand the unique shocking from piston type high power air rifle. -One piece airgun mount with 3 clamping screws plus built-in removable stop pin helps the scope to stay in place against powerful shocking during shooting. -Integral rings for better alignment of the scope. -Fits onto 3/8" & 11mm dovetail rail or groove on top of the receiver. -Anodized black matte finish. -Overall Length: 13 1/2".