The Fortis Camber Rail System features the innovative Camber Lock mounting system for the most secure handguard platform available. Constructed from aircraft grade 6061-T6 aluminum with Type III hard-coat anodized finish this 9.6" M-LOK handguard delivers exceptional rigidity while maintaining lightweight performance.Fortis Camber 9.6" M-LOK Handguard for AR-15Revolutionary Camber Lock mounting system with stainless steel barrel nutAircraft Grade 6061-T6 Aluminum constructionHandguard weight: 7.08 oz Barrel nut: 2.9 ozM-LOK slots at 3 6 9 o'clock plus offset positions at 1:30 4:30 7:30 10:30Continuous top rail with 1.34" internal diameterEasy installation with T30 Torx L-Key includedMade in USADesigned for professionals and enthusiasts who demand the most secure rail platform this handguard provides multiple M-LOK mounting positions for lights accessories and switches while ensuring rock-solid stability and easy serviceability.