Is that 6cm on optics, red dot or irons?
At the weekend I was shooting stood up supported, getting 6" at 30m with propane, 6.03/303mm barrel, .32 Geoffs, TM bucking, biro mod and red dot optic. Although it was a bit windy. So your 6cm seems very good to me.
I'm tweaking my set up this week, and will give it a test. I'm planning on the same 30m range, Mapp, 370mm Crazy Jet barrel, .32 Geoffs, Modify X bucking, SixG nub, HSB, and last but not least a decent x6 LPVO.
I've not even been able to skirmish the thing due to Lockdown2, but the more I get into it the less interested I am in picking up an AEG ever again. If we say a 2.3 joule bolty and mk23 is like playing airsoft on hard mode, is the MWS platform, with its 1/2 kilo magazines like playing airsoft on ultra?