Geissele 15" M-LOK MK14 Black Super Modular Rail 05-575B

Geissele 15" M-LOK MK14 Black Super Modular Rail 05-575B is the long end of Geissele's slim-profile rail - same reduced-diameter design as the shorter MK14 lengths, stretched out here for builds that need extended coverage without the bulk of a standard-diameter handguard.

At 2.02" tall with a 1.27" inner diameter, this Geissele Super Modular Rail MK14 measurably reduces what your support hand has to wrap around compared to Geissele's MK16 or MK4 lines - noticeable on a rail this long, where a bulkier profile really starts to affect how the rifle balances. It's machined from 7000-series aluminum and mounts through the same proven 2.25" Geissele barrel nut used across the lineup, with long surface contact against the receiver that keeps the rail straight and true through repeated disassembly.

M-LOK slots sit at 3, 6, and 9 o'clock, and a full-length Picatinny top rail runs the entire 15" span. This Geissele SMR MK14 comes in around 11.6 ounces bare, 13 with the barrel nut - genuinely light for a rail this length, and the slim cross-section makes it feel even lighter in hand than the number suggests.

Key Features:

• 15" free-float length, full-length Picatinny top rail
• M-LOK slots at 3, 6, 9 o'clock
• 7000-series aluminum, Type III hardcoat anodized
• Proprietary 2.25" Geissele barrel nut
• Height 2.02", inner diameter 1.27", outer diameter 1.52"
• Weight: 11.6 oz bare, 13 oz w/ barrel nut
• Black finish
• Fits mil-spec AR-15 upper receivers

If a standard-diameter 15" rail has ever felt like too much handguard in hand, this Geissele MK14 Rail is the fix - reference M-LOK Rail family or part number 05-575B when ordering.