Your rail now automatically ships with (6)  Snakeskin polymer grip panels at not charge! GEN II barrel nut design is lighter, simpler, and easier to install!  Just torque to the recommend barrel nut torque setting, slide rail over and install 8 set screws and you are done!  No need to time barrel nut or align threaded holes, plus a cleaner look than the original Transformer Rail!  M-LOK and Keymod....ON THE SAME RAIL! The Transformer Rail comes with the rail, barrel nut, barrel nut wrench, and six polymer grip panels.  Additional panels available in pulldown menus! Specifications: • AR-15 Aluminum Free Float rail system with ability to intermix Keymod, M-LOK, and polymer grip panels • Dimensions: 13” length, 1.5” exterior width, 1.09” interior clear width • Weight: 8.4 ounces for rail, 1.5 ounces for barrel nut, under 0.3 ounces per panel • Weight installed: 9.9 ounces (only adds 7.4 ounces as original barrel nut is removed) • Barrel nut material and finish: 6061 6061 T6 aluminum with Milspec Type III Black hardcoat anodizing • Rail material and finish: 6061 T6 aluminum with your choice of Milspec Type III Black, O.D. Green, or Flat Dark Earth hardcoat anodizing • Panel material and finish: 6061 black anodized aluminum and proprietary polymer  • Ships with Transformer Rail, Barrel Nut, Barrel Nut Wrench, all hardware, 6 polymer grip panels, allen wrenches, and instruction sheet • Interchangeable Transformer panel system allows for mixing of Keymod, M-LOK, and polymer grip panels. Other panels, such as Picatinny, will launch after initial release • Six Transformer panel mounting locations • GEN II barrel nut design is lighter, simpler, and easier to install!  Just torque to the recommend barrel nut torque setting, slide rail over and install 8 set screws and you are done!  No need to time barrel nut or align threaded holes, plus a cleaner look than the original Transformer Rail! • Eight QD sling swivel pockets- three on each side and two underneath • Clears low profile gas blocks and works with all gas system lengths (carbine, midlength, rifle) • 100% Designed and Made in the USA • Multiple Patents Pending