The MAC was running a 32 rnd mag, and I had a 25 rnd mag in the UZI. You'll notice the MAC empties out before the UZI.... that's why I ran the smaller mag for the video. I have 32 rnd mags for the UZI, but on video, the faster cyclic rate on the MAC would have meant they wouldn't have finished an...
Yeah, it's running the BlackJack Buffers 1.4" buffer.