The NAM 12.7mm Medium Chain Gun is a weapon designed to take down power armor and light vehicles, primarily in atmospheric conditions when Positron and Plasma weapons are inappropriate, though it is perfectly viable for use in space as well.

It was first introduced by NAM in YE 32 and continues to be a staple Nepleslian weapon, Primarily through use by the Raider series of powered armor frames. It finds use as a vehicle mounted weapon, as a Power Armor machine gun or a light infantry support weapon mounted on a tripod. The chain gun uses external power instead of recoil to load each round. It uses a motor to load 12.7mm linkless ammunition. It can use chemical rounds or act as a simple mass driver needing the user to simply switch between modes. This dual feature was added in YE 35.

• Designer: NAM
• Manufacturer: NAM
• Name: NAM 12.7mm Medium Chain Gun
• Type: Chemically fired machine gun or Gauss machine gun
• Role: Anti-Armor
• Length: 1.25m (4'1“)
• Weight: 35kg (unloaded)

The 12.7mm Medium Chain Gun is a simple three barreled chain gun that is belt fed. It ejects spent casings rightwards.

• Muzzle Flash: Bright yellow flashes if chemical rounds are used, none if Gauss rounds are used
• Retort: A loud revving sound as the barrels spin, whirring like a buzzsaw when firing
• Effective Range: 2 KM in Atmosphere, Nearly Unlimited in Space
• Maximum Range: 4 KM in Atmosphere, Nearly Unlimited in Space
• Rate of Fire: Up to 750 RPM
• Recoil: Variable. If vehicle or tripod mounted, recoil is minimal due to greater stability and shock absorption. If handled by a Power Armor, recoil is moderate when fired in bursts.

• Ammunition: 12.7mm
• Round Capacity: 650 rounds; each belt is loaded with the same kind ammunition.

• Firing Mechanism: Battery-powered motor
• Loading: Power loading
• Mode Selector: Chemical Rounds or Gauss
• Firing Modes: Automatic
• Safety Mechanism: None
• Weapon Sight: Iron sights may be mounted, otherwise none
• Attachment Hard Points: None

• 12.7mm Medium Chaingun 10,000 DA

• Barrel: 600 DA
• Motor: 2000 DA
• Battery: 1500 DA
• Tripod: 500 DA

The NAM 12.7mm Ammunition is not for sale outside the SMDION. Buyers wishing to purchase the Medium Chain Gun must find their own 12.7mm rounds.