This model is based on well-proven predecessors, such as 2100B and M4-177. It is a replica of well known SCAR rifles. The main feature of MK is pumping air with forend. You have to pump at least 3 times, for maximal power 10x. The rifle is intended for steel BBs, which are preferable to the destructive and fun shooting. Magazine can holds up to 18pcs. If you are a fan of accurate target shooting, you can use pellets. Pellets are inserted into the magazine for 5 pcs. The rifle is made of hard plastic and the main internal parts are from metal.
MK is equipped with fully adjustable classic sights. Or you can use the 22mm rail for mounting rifle scope. Loading of BBs is very simple. BBs are stored into the handle which can hold up to 300pcs.
Practical experience: Unlike the models 2100 and M4, MK has longer forend and therefore pumping is easier. Plastics are hardened and do not creak.