So update on the g&p 3.5 valve. I was getting pretty bad results from it. My bone stock mws/MTR16 bolt gives me 83-89m/s with a fully gassed up and fully loaded magazine with 0.25’s which is around 1j and below.
The very same bolt with the g&p 3.5 valve in its setting which directs most air forward (the setting which should give me the most m/s), I got a maximum of 98m/s, around 1.2 joules I think. The variance was also greater- towards the end of a fully gassed up magazine I was getting as low as 85m/s down from the initial shots of 98m/s. The trade off of shot-to-shot consistency for that extra 0.2j isn’t worth it to be honest so I’ve swapped back to the stock valve.
I also tested the g&p valve on its most “closed” setting and I was getting very inconsistent m/s, between 45 and 60. Maybe this setting is out of the operational range of the valve though.
All in all, I really like the g&p bolt, although the increase in joules was unexpected. I’ll reserve this bolt for outdoor use I guess since my cqb arena operates at a max 1.2J and I get 1.25 with the g&p bolt. The g&p adjustable valve leaves a lot to be desired in my case. Others seem to have had success with it but for some reason in my system it didn’t give me the FPS boost I wanted.