All HERA IRSL handguards are compatible with each other, thanks to HERAs proprietary barrel nut. This approach to manufacturing has been integral in making the IRS handguard one of the leading systems on the market. Available in 12in (M-Lok / Sport) and 15in (M-Lok). HERA IRSL aluminum handguard based on our established IRS design. Leather applications provide increased grip, excellent wear resistance, and a breathable, soft-touch surface. Our HFGL comes with a pre-installed 3mm leather cord. All HFGL handguards are compatible with Gen. 1 and Gen. 2 HERA handguards as well as HERA barrel nuts and can be interchanged easily. Specifications for HERA Arms AR15/M4 IRS-Leather M-LOK Handguard: Manufacturer: HERA Arms Finish: Anodized Fabric/Material: Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Gun Rail: M-LOK Included Accessories: Standard Quantity: 1 Package Contents: HERA Arms AR15/M4 IRS-Leather M-LOK Handguard