I have had a minimag with a z-grip and a 2001 autococker. The mayhem has similar looks to a mag and shoots like mag or cocker flat and straight
Marker Setup:
Mayhem ET vertion 2, dye exell barrel, custom gas through grip, custom drop, vert feed tube, 12v rev loader, and anti siphon 20oz co2 tank
Recommended Upgrades:
a barrel other than stock, gas through grip, 12v rev loader, a properly anti siphon tank. PGI has a gas through grip, double trigger frame, and board you can purchase
Strengths:
Affordable about 400 dollars new and 300 used for the version 2 . Small and light weight, autococker barrel threads, you can change it from left, right, or vert feed with a ANGEL feed tube or with spyder's plastic vert adapter. 100psi operating pressure (that's super low pressure for a paintball marker) that low of pressure makes the marker shoot brittle paint with ease
Weaknesses:
It didn't come with a vert feed adapter, sloppy trigger, plastic frame, can't get any upgrades for it on the internet for it. can't get very many upgrades at all unless you call the company, or your machinist like myself and can make your own parts.
Conclusion:
The mayhem doesn't have the fast rate of fire like a bushy or angel but good buy for the money. some people say this gun chops paint bad I personally haven't seen it chop at all maybe because I take it apart every time when I'm done playing with it like my bushmaster and lube it with Dow 33.