Geissele 15" M-LOK MK8 DDC Super Modular Rail 05-286S

Geissele 15" M-LOK MK8 DDC Super Modular Rail 05-286S was one of the first Geissele rails built around M-LOK back when that mounting standard was still new, and it's stuck around because the fundamentals were right from the start.

Machined from 6061-T6 aluminum and Type III hardcoat anodized in Desert Dirt Color, this Geissele Super Modular Rail MK8 locks to the receiver with Geissele's proprietary 2.25" barrel nut - longer than a standard nut, which means more surface contact with the receiver and a rail that stays straight and true even after you've pulled it off for maintenance and put it back on. M-LOK slots run at 1, 3, 6, 9, and 11 o'clock, giving you real flexibility on where lights, grips, and bipods actually go instead of fighting a fixed layout.

The lower 45° quadrants are vented pretty heavily, which cuts weight and helps a hot barrel shed heat faster. All told this Geissele MK8 Rail comes in around 12.4 ounces bare, 14.3 with the barrel nut - genuinely light for a 15" tube.

Key Features:

• 15" free-float length, full-length Picatinny top rail
• M-LOK slots at 1, 3, 6, 9, 11 o'clock
• 6061-T6 aluminum, Type III hardcoat anodized
• Proprietary 2.25" Geissele barrel nut
• Height 2.3", inner diameter 1.35", outer diameter 2.11"
• Weight: 12.4 oz bare, 14.3 oz w/ barrel nut
• Desert Dirt Color finish
• Fits mil-spec AR-15 upper receivers

This is a Geissele rail that earned its reputation early and just kept delivering — a solid pick for anyone building a longer-barreled AR-15 who wants proven mounting real estate.