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OOW M240-SLR Beltfed Semi-Auto


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View M240-SLR Specifications Here

Mockingbird Precision is pleased to offer this brand new unique, re-engineered, beltfed, semi-automatic version of the M240 machine gun by Ohio Ordnance Works, Inc. (OOW). Delivering up to minute-of-angle (MOA) accuracy, high capacity, and proven durability, this weapon is ideal for situations which require highly accurate, sustained, controlled fire.

The M240-SLR is dimensionally identical to the M240, and is able to integrate into any M240 mounting system. The most noticeable difference between the M240-SLR and the M240 machine gun is that the SLR fires from a closed bolt. Many of the internal parts of the firearm have been redesigned, introducing an entirely new breed of M240.

The bolt and trigger groups are new and not interchangeable with the original M240. These new internal parts are all manufactured by OOW at our ISO certified facility where we are able to ensure that quality meets our stringent standards.

While the internal mechanism of the firearm has been redesigned, we've kept it simple. The M240-SLR requires only two tools to break it down. All other actions such as barrel changing, loading, feed cover functions, etc. remain the same as the original M240.

In field tests, using match ammunition, a randomly chosen weapon easily produced minute-of-angle (1") groups at 100 yards! In both single and rapid fire (400 rpm) tests, absolutely no malfunctions were experienced with the gun...a true testament to its superb engineering.


Caliber                                 7.62 x 51mm

Finish                                   Phosphate

Operation                            Closed Bolt, Semi-Automatic

Feed Mechanism              M-13 Link

Weight Empty                    24.2 pounds

Length Overall                  47.5 inches with flash hider

Barrel                                 4 Grooves w/ uniform RH twist, 1/12

Barrel Length                    20 inches

Sights                                Open, Adjustable Iron

Firearm Includes:

  • Sling with Hook Assembly
  • Regulator Scraper
  • Plastic Lubricant
  • Needle Nose Pliers
  • Brass Hammer
  • Combination Scraper Tool
  • Disassembly Tool / Front Sight Combo Adjusting Tool
  • Ruptured Cartridge Case Extractor
  • Crew Served Weapons Tool
  • Disassembly Tool
  • M240 Custom Fitted Hard Case
  • M240 Cleaning Kit
  • Parts Pouch
  • Operating & Technical Manual
  • 2,500 M13 Belt Links

  • Model: OOW M240-SLR
  • Manufactured by: Ohio Ordnance Works