Inokatsu MTW M4 essentially a shorter version of the same gun. Inokatsu designers worked to refine their mechanism to deliver an unparalleled gas blowback experience that generates good usable power, while providing customers with a choice of light or heavy recoil through the use of a removal weight in the bolt! This is a first in the world if Airsoft, and is now available in this SUPER version. Do not confuse this with the earlier 2009 version which does not have this weight adjustable bolt! The bodywork as usual is top notch, and with their SUPER version, they have even have a fully licensed forged aluminum receiver with licensed Colt markings. Manufacturing process and coating of the receiver is the same as the real steel version (forged + CNC), making the Inokatsu M4 one of the most realistic looking airsoft guns available today, the color and finishing is spot on. Needless to say, each and every bit of its licensed body work had been expertly engraved into the body, the M4 MTW CQBR of course has its own unique serial code. Realism even shows on the way the selector lever operates, such as not being able to flip the switch from semi / full auto to SAFE position unless the gun is cocked. This is the same as on the real M4. In the spirit of this being a training weapon, the barrel thread is the same thread and measurement as the REAL M4 for realism. The CQBR SUPER Version of the INOKATSU M4 is extremely well made and put together with pinpoint precision, making the INOKATSU extremely robust. The entire gun is SOLID with no wobbles and shakes. It feels like a real gun when you pick it up. Featuring a weight adjustable bolt carrier, the M4 kicks like a 9mm real steel weapon every time you pull the trigger with the weight installed (kick is just as strong as previous version Inokatsu M4). On the semi-automatic firing mode, the INOKATSU M4 CQBR is able to completely fire off all 50rds from its magazine. But if you are a skirmisher and want a faster rate of fire and don't care about the recoil as much, remove the weight from the bolt and the M4 can easily finish 50 rounds in full auto. To obtain this performance while maintaining a VERY strong recoil kick, Inokatsu had to dial down the power from the originally planned 460fps to approximately 400fps - 440fps. This still generates a lot of stopping power. If you leave the weight in the bolt and run it at full auto, you may get less than 50 rounds on one charge of gas but you'll enjoy a much stronger recoil for a more memorable shooting experience (rate of fire will be lower though). Regardless, each and every shot with the INOKATSU CQBR would more than definitely put a smile on your face! The sound is loud and if you put your face against the gun for automatic fire, your ears will ring!