Geissele Automatics Super Modular Rail MK20 - M-LOK - Black - 14.6"

When your 16" or longer AR-15 build demands the lightest full-length handguard available without sacrificing rigidity, the Geissele MK20 14.6" Super Modular Rail at 10.8 oz delivers one of the lowest-weight all-aluminum M-LOK handguards available for standard-length AR-15 platforms — developed for U.S. Border Patrol and proven in duty use.

The Geissele MK20 14.6" Super Modular Rail is an M-LOK handguard designed for 16" and longer AR-15 platforms where maximum weight savings is the priority, without sacrificing the Super Stiff rigidity that ensures consistent accessory mounting and shooting accuracy under hard use.

The 14.6" length suits standard 16" government and mid-length barrel AR-15 builds, providing almost full barrel coverage for heat management during sustained fire and maximum surface area for accessory mounting at 3, 6, and 9 o'clock M-LOK positions. The MK20's skeletonized 7000-series aluminum design removes mass from non-structural areas while maintaining the critical rigidity at the barrel nut interface and mounting surfaces — the result is a handguard that achieves the Super Stiff designation that Geissele handguards are known for at a weight that belies its length. The Geissele Barrel Nut installs with a standard armorers' wrench for straightforward installation and removal, and anti-rotation tabs and set screws lock the rail positively to the upper receiver to prevent rotation under heavy accessory loads and recoil stress. The full-length M1913 Picatinny top rail provides maximum optic and sight mounting surface.

Length: 14.6". Weight: 10.8 oz (rail only) / 12.42 oz with barrel nut. Material: 7000 series aluminum. Finish: Type 3 hardcoat anodize, black. Top rail: M1913 Picatinny. Side/bottom: M-LOK. Inner diameter: 1.36". Outer diameter: 1.59" (DAQ). Height: 2.388". Anti-rotation tabs and set screws. Geissele Barrel Nut included. Compatible with standard mil-spec AR-15 upper receivers.

7000 series aluminum with Type 3 hardcoat anodize provides corrosion resistance and surface hardness for duty and hard-use applications. The skeletonized design delivers Super Stiff rigidity at minimal weight across the 14.6" length.

Ideal for 16" AR-15 patrol rifle and competition builds where full-length handguard coverage, maximum M-LOK accessory mounting surface, and minimal weight are all required simultaneously.

Backed by Geissele's manufacturer warranty. Geissele Automatics is a leading manufacturer of precision AR triggers, handguards, and accessories based in North Wales, Pennsylvania.