Systema finally expanded their range beyond M16/M4 with the release of the TW5-A4, really an MP5, which is now at RedWolf. The MP5 offering still come in different levels for different budgets. The challenge kit, TW5-A4 and the TW5-A4 MAX. The same fire control unit as was used in previous models has returned but has now been improved to increase reliability. The fire controller also allows for a three-round burst option along side the semi and automatic settings. It seems that the same attention to detail and realism that made a name for Systema in the airsoft community has been applied to this gun. Now you can have ultra-realism no matter what your game, indoor or out. RedWolf posted a review of it in the product information. What are you waiting for, check it out:

Systema MP5 at RedWolf