@Shizbazki having owned 3 GHK m4’s, the mws’s outshoot them all day long, especially out of the box specs. If the hop rubber is black, there’s a good chance it’s a standard bucking.
@camden I use propane, but power should be similar. I’ve ran guarder power up gas in mine in this colder weather and it brings the crispness back that it starts to loose. Black gas should be fine now. Wouldn’t be using it in the summer though as it’s super snappy on green/propane anyway.
Ive never used one in an mws personally, but people swear by them. https://www.skirmshop.co.uk/250mm-604-crazy-jet-gbb-inner-barrel.html
i have used them in my WE scar H and mk23 and had great success though. There’s a few good barrels out there, just remember if you’re keeping the same length, you need a tighter than standard bore to increase the power. I’d avoid the PDI raven though. 6.01 made it over 350 for me and the hop window is tiny