Mak Hobby shows us why the KWA MP7 Gas Blowback SMG in this video... "KWA MP7 (H&K) is with the Angry Gun mock suppressor (with extended inner barrel) combo up to the most powerful airsoft submachine gun ever (Yes, more powerful than the Kriss Vector) The gun is shooting 0.25g at 538 FPS, 3.4 joules. The competitor Kriss Vector with power upgrade only goes around 500fps with 0.25g, a bit weaker. If you even put on more upgrades such as a better barrel, hop-up and maybe even seal the air better, it might give you a bit more power and push it up to the 4 joules mark.

We are testing this gun with Elite Force 0.25g BBs and also 0.30g Aluminum BBs bought from PyramidAir. Keep in mind that aluminum BBs do not work so well in this gun, it will jam up the mag from time to time, sort the BBs by size and lube the mag first if you want to avoid jamming.

Great accuracy, power and realism. 10/10 rating, bang for the bucks, you got it, the most powerful airsoft submachine gun ever. No SMG in AEG or GBB form can replace this guy so far."