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by KWA
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New to KWAs LM4 platform is the KR 12 gas blow back rifle. This LM4 variant boast the new KWA KeyMod rail interface that combines light weight ergonomics with rugged durability. These SPRs are available in five lengths ranging from a 6 inch barrel all the way up to a 20 inch barrel to give the operator a rifle for every situation. These modern features coupled with the tried and true designs of the standard issue AR15 make this rifle easily adaptable for any situation.


The KWA LM4 Professional Training Rifle is an ATF approved gas blowback AR style rifle available in the United States. It features a new hop up system that was developed for the LM4 to improve range performance on the field. An aluminum alloy receiver houses the full steel reinforced bolt carrier for strong reliable feedback. The LM4 PTR buffer tube has the same diameter of a MilSpec Butt Stock which allows operators to customize to their weapon configuration. In addition, the lower receiver can accept aftermarket AR15 pistol grips and trigger guards. Other details such as the operational forward assist and bolt catch feature provides the user unparalleled realism by mimicking fundamental AR15 weapon manipulation. Similar to real AR15 style rifles the LM4 PTRs modular design allows limitless customization options to best suit the individuals training needs.

The AR15 was originally designed as part of the U.S. militarys initiative to develop a lighter smaller caliber weapon as the standard infantry rifle. This innovative weapon utilized aircraft technology to lighten the rifles overall weight. This led to the creation of the M16 which has served as the backbone of the U.S. Military for more than 40 years. Since its inception shorter variations of the M16 were developed for the US Special Forces and other branches of the military, such as the M4A1.

Part# KWALM4KR12


Caliber 6mm
Magazine Capacity 40 rounds
Gas System Force Velocity [FV]
Propellant Green Gas
Dim. / Wt Inner Barrel Diameter:
Inner Barrel Length:
Outer Barrel Length:
Overall Length (Retracted):
Overall Length (Extended):
Weight w/o Magazine:
6.05 mm
414 mm
409.58 cm [16.13"]
841.38 cm [33.13"
923.93 cm [36.38"]
2.83 kg [6.25 lbs]
Performance Rate of fire:
Energy Output with 0.20g BB:
13+ RPS
110-116 MPS [360-380 FPS]
1.20 Joules
Special Features
  • Gas operated recoil blow back
  • Realistic construction & field stripping
  • Full metal alloy flat top receiver
  • Full metal lower receiver
  • Adjustable hop-up
  • Bolt catch, release
  • Adjustable front and rear sights
  • Removable carry handle
  • 6 position collapsible stock
  • Semi-automatic & automatic select-fire
  • Ergo PTS Grip

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