GOTICAL 1 Inch Diameter Combo Low Profile Picatinny Rings Sight Rifle Mounting System with M38, M39 and M44 / Mosin Nagant 91/30 Picatinny Rail Scope Mount ✔ Tape integrated inside by rings to prevent damage to scope , it also prevents slippage and clamping position properly. ✔ With 2 precision clamping screws and repeatable arrangement. ✔ Ring Style: Low Profile, 2 Piece, 1000 in. Material: Aircraft Grade High Quality 6061 Aluminum Alloy. Ring Diameter: 1 '' ✔ Total weight: 2 oz each ring. ✔ Rail Type: 8mm Weaver / Picatinny Rails. Specifications of Mosin Nagant 91/30. Scope mount rail: ✔ Constructed from high quality aircraft grade anodized aluminum. Accepts all standard 1913 Picatinny / Weaver accessories. ✔ No drilling, tapping or weapons required. ✔ Mounting to the rear view of the 91/30 M38, M39 and M44 models. Package Includes: 2 Low Profile Rings. 1 Mosin Nagant 91/30 Picatinny / Weaver rail. 1 Allen key.