The Cybergun Colt M4A1 carbine strikes a perfect balance between looks and functionality and delivers semi/full automatic firepower at shot velocities needed to advance your squad toward victory. This gun has a metal barrel with a weight relieved ABS plastic stock & receiver. The gun weighs slightly under 5 lbs and is comfortable to carry in the battlefield for extended airsoft skirmishes. The Colt M4A1 carbine features a detachable carry handle that exposes Weaver/Picatinny rail for mounting optional shooting accessories, a high capacity 300 rd magazine and a shot velocity of 335-345 fps (using .20g BBs). The gun has sling mounts that allow a gun sling to be attached for easy carrying, and the adjustable hop-up unit can be tweaked for the long range accuracy needed to dispatch faraway battlefield targets.
CG180800E[PY-2953-6579] is the Colt M4A1 with Swiss Arms Power Booster. The power booster is a plug & play burst control unit. The unit allows your gun to fire in 1-15 round bursts. The power booster has two plugs, simply plug the short plug into the gun and plug the long plug into the power booster to use. You'll need to program the power booster to accommodate your gun's AEG battery (supported AEG battery types: 11.4 & 7.1V LiPo & 8.4 & 9.6V NiMh). Use a small pin to properly program the unit to the type of AEG battery you're using. Example. For 8.4 NiMh AEG battery types: Push down and hold the button until the light turns red, press the button down 3 times to select the 8.4V NiMh battery type & hit and hold the button down.
The power booster can also be programmed for desired number of burst fire shots (between 1-15). To program the burst fire: hold the trigger down to let your AEG cycle, you'll feel a vibration in the grip. Release the trigger after the vibration is felt and pull the trigger down the number of burst fire shots you desire from the gun. Example for a 3-shot burst: Pull the trigger down four times & hold the trigger down on the fouth time until you feel a vibration in the grip. Release and pull the trigger for the 3-shot burst.
Things I liked:Decent power, good value (initially). Things I would have changed:Better build quality. What others should know:I got this for my son for x-mas and it started having problems almost immediately. The mounting for the butt-stock started coming loose the first time he used it and got progressively worse. Next it started jamming - a lot - to the point where it is unusable. It is out of warranty (only 30 days) so it just sits. I recommend to pass on this one, save your money, and get a better model. That's what we will be doing - only starting from $0 rather than $130.