Geissele 9.3" M-LOK MK4 Black Super Modular Rail 05-283B

Geissele 9.3" M-LOK MK4 Black Super Modular Rail 05-283B is the shortest option in Geissele's ultra-rugged M-LOK lineup - the same integrated Picatinny-plus-M-LOK design as the longer MK4 rails, just trimmed down for pistol builds and shorter-barreled configurations.

Machined from 7000-series aluminum and Type III hardcoat anodized, this Geissele Super Modular Rail MK4 locks onto the receiver through Geissele's proprietary 2.25" barrel nut, which gives it noticeably more surface contact with the upper than a standard nut - the reason these rails hold zero through repeated disassembly rather than gradually working loose. Integrated Picatinny sections sit at 3, 6, and 9 o'clock up front, so lights and lasers that need a hard mount aren't stuck relying on M-LOK adapters.

M-LOK slots cover those same 3, 6, and 9 o'clock positions plus the upper 45° quadrants, and aggressive venting on the lower sections keeps weight down. This Geissele MK4 Rail comes in at 9.3 ounces bare, 11.2 with the barrel nut - light for a rail built this rugged, since the MK4 line doesn't sacrifice much rigidity to get there.

Key Features:

• 9.3" free-float length, full-length Picatinny top rail
• Integrated Picatinny sections at 3, 6, 9 o'clock
• M-LOK slots at 3, 6, 9 o'clock plus upper 45° quadrants
• 7000-series aluminum, Type III hardcoat anodized
• Proprietary 2.25" Geissele barrel nut
• Weight: 9.3 oz bare, 11.2 oz w/ barrel nut
• Black finish
• Fits mil-spec AR-15 upper receivers

This Geissele 9.3 Handguard delivers the same hard-mount versatility as the longer MK4 rails in a package built for compact, short-barreled builds.