Simple and Friendly Installation, no Gunsmith or Tool Required - Do Not Need to Remove Original Handguard Great Zero-retention Capability for all Accessories Installed on the Rails Intensively Tested by Field Experts Under Extreme Heat and Sub-zero Temperature and Demonstrates Most Satisfactory Performance Ultimate Tactical Solution to Enhance Accuracy Under Toughest Environments Universal Design Fits Model SKS and Variants with Standard/Oversized Barrel and Gas Tube Hard Anodized Finish for Wear Resistance. UTG Rubber Rail Guards Included for Great Comfort and Protection Leapers UTG SKS Quad Rail System Limited lifetime warranty. MNT-HG569SA.