M-LOK Rail Systems

Shop M-LOK Rails at No Boring Guns for AR-15s, precision rifles, and modern sporting firearms. This collection features modular locking accessory systems that provide lightweight mounting solutions for lights, grips, and bipods without the bulk of traditional quad rails.

M-LOK rail systems revolutionized how shooters attach accessories to their firearms. The Modular Lock system creates flush mounting points along handguards, reducing weight while maintaining structural integrity. When additional Picatinny sections become necessary, M-LOK rail sections install exactly where needed.

The M-LOK attachment system uses slots machined into handguards and chassis systems. Accessories mount directly into these slots using a recoil lug and clamping mechanism that locks components securely against the parent surface. For accessories requiring traditional Picatinny mounting, M-LOK rail sections convert slotted surfaces into standard rail segments.
Choosing M-LOK Rail Components
Rail Section Length and Placement
M-LOK rail sections come in various lengths measured by slot coverage. Short sections accommodate individual accessories like lights or vertical grips. Longer segments support bipods or multiple accessories mounted adjacent to each other. Placement matters – bottom rail sections often need greater length for bipod mounting, while side sections typically remain shorter for light switches or tape switches. Consider accessory footprint before selecting rail section length, as oversized rails add unnecessary weight while undersized options may not provide adequate mounting surface.
Material and Construction Quality
Aluminum rail sections provide excellent durability for hard-use applications. Anodized finishes resist corrosion and wear, though coating quality varies between manufacturers. Steel mounting hardware typically accompanies quality rail sections, as softer hardware strips under torque. Polymer rail sections reduce weight significantly but sacrifice some durability – acceptable for light-duty accessories, questionable for heavy bipods or accessories experiencing significant impact. The mounting interface matters as much as the rail itself. Properly machined recoil lugs and adequate clamping surface area prevent accessories from shifting under recoil.
Slot Compatibility and Spacing
Standard M-LOK spacing follows published specifications, but manufacturing tolerances affect fit. Quality rail sections slide into slots with moderate resistance – too loose indicates poor tolerances, while excessive tightness suggests dimensional issues. Cross-compatibility between brands generally works well, though mixing extremely budget components with premium handguards sometimes reveals fitment problems. Testing fit before permanent installation prevents compatibility surprises.