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FN® MK 16 LB

Chosen by U.S. special operators as the next generation assault rifle platform, the MK 16 provides the range, reliability, accuracy, safety, ergonomics, and modularity to meet any operational challenge. A selective-fire, semi-, and full-auto 5.56x45mm rifle using a short-stroke gas piston, the FN® MK 16 LB is configured for long-range engagements. It can be quickly converted to its shorter counterparts – the FN® MK 16 and FN® MK 16 CQC – at operator level in just minutes. Unlike many currently fielded 5.56x45mm rifles, controllability under recoil is a hallmark of the MK 16, allowing the operator to readily engage targets with multiple well-aimed rounds. The MK 16 has been tested and fielded with U.S. Armed Forces. It adds the same innovation, modularity and adaptability as the MK 17, only in a smaller caliber.

Learn More about the FN SCAR® System

Military pricing on request.

*Product follows USA specifications
*Military products available to U.S. sales only


  • Caliber: 5.56x45mm
  • Operation: Short-stroke gas piston
  • Mag Capacity: 20 or 30 Rd.
  • Weight: 7.7 lb.
  • Barrel Length: 18"
  • Overall Length: 29" - 39"
  • Effective Range: 800m point target
  • Rate of Fire: 625 RPM
  • Color: Flat Dark Earth


Hard-anodized monolithic aluminum receiver

MIL-STD-1913 accessory rails at the 3, 6, 9, and 12 o’clock positions

Integral, folding front and rear back-up iron sights


Cold hammer-forged, chrome-lined, free-floating

Barrel can be changed by operator in less than five minutes


2-position PARA stock design, buttplate cap, or compatible with SCAR®

Composite polymer construction with aluminum rails (shown)
provides for a more compact weapon package in aircraft and vehicle use


Ambidextrous selector lever and magazine release

Charging handle may be mounted on right or left side

Enlarged trigger guard for easier access when wearing gloves

Adjustable gas regulator for use with sound suppressor to maintain constant rate of fire


Steel magazine body

Low-friction follower

Compatible with M16/M4 magazines