Precision Machined from Aircraft Aluminum Alloy with Maximum StrengthHard Anodized Finish for Wear Resistance22 Slots on Top Rail, 21 Slots on Left and Right Rails, 7 Slots on Bottom RailBottom Rail with Special Notch to Accommodate Folded BayonetSimple and Friendly Installation, No Gunsmith or Tool RequiredSolid Locking Features for Most Secure FitUltimate Tactical Solution to Enhance Accuracy Under Toughest EnvironmentsOptimized Dimensions to Fit All SKS Models and VariantsNOTE: Modification may be needed to make this mount fit with ATI/TAPCO or other aftermarket stocks.