Geissele 14.6" MK20 Dual Tab Black Handguard Assembly 05-2556B is what you get when you push weight savings about as far as it can go without turning a handguard into a liability. This thing is heavily skeletonized - cut away everywhere that doesn't need material - and it still holds up under recoil the way a solid rail does. Machined from 7000-series aluminum, it locks to the receiver through a dual anti-rotation tab clamp system paired with Geissele's easy-install barrel nut. Geissele calls the rigidity rating "Super Stiff" internally, and honestly, that tracks - you don't expect a rail this light to feel this locked-down, but the anti-rotation tabs and set screws are doing real work here, not just checking a spec sheet box. A full-length Picatinny rail covers the 12 o'clock position, and M-LOK slots at 3, 6, and 9 handle everything else you'd want to hang off it. At 10.8 ounces bare and 12.42 with the barrel nut, this is about as light as a 14.6" rail gets without switching to a different material entirely. Most handguards this long start adding noticeable weight up front - this one just doesn't. Key Features: 14.6" free-float length, full-length Picatinny top rail M-LOK slots at 3, 6, 9 o'clock 7000-series aluminum, skeletonized design Dual anti-rotation tab clamp system Height 2.388", inner diameter 1.36", outer diameter 1.59" Weight: 10.8 oz bare, 12.42 oz w/ barrel nut Black finish Fits mil-spec AR-15 upper receivers Geissele 14.6" MK20 Dual Tab Black Handguard Assembly 05-2556B