If you prefer an MP5 GBB rather than an AEG or an NGRS, you can check the offerings from VFC. They are producing a licensed MP5A5 gas blowback SMG and this should be available at reputable sellers worldwide via Umarex. In this video review by Mach Sakai, he goes over the details such as Realistic Cocking Handle Assembly, Ambidextrous Trigger Group, 3-round burst, and a quick shoot at his range to see how it performs.