Just a heads up for anybody after full size TM mags - Firesupport has had a batch in. 42 left as of this morning, but I have just bagged 3 of those...
I could also use some advice with upping the fps on my newly aquired mk18. As a recent GBBR convert, I (possibly foolishly) hope to use my MWS as much as possible during the UK winter. After testing 4 types of gas on Sunday, I was seeing unimpressive fps: around 300 on a .20 using Nuprol 4.0 at 9/10 degrees outside. It's going to get much colder than this, and 300 fps is not going to cut it against AEG's at a 370 fps Stirling game.
I am really enjoying tinkering with the gun, but have so far just done the GG mod to the mags, which has helped somewhat. The magazines do not seem to be the weak link, and the winter gases are doing the best they can. I'm building up courage to have the front end off, but I need to be very careful as I plan to sell the furniture as a TM complete mk18 upgrade kit, as I have other plans for the base gun.
When I do get it apart, I have a 303mm 6.02 lapped barrel to try, and a nub and HSB from Dave on order. In the meantime, I have borrowed a rocket valve from an old KWA MP9, and switched out the stock TM one. After leaving mags in the fridge overnight, on Nuprol 3.0 on .20 bb's I chroned at 390 fps, then 380, 363, settling on 340 ish.
Impressive, but not skirmishable. Angry Gun adjustable nozzle kits are out of stock everywhere, and when I asked a UK seller about MWS NPAS kits, he said that would not help, as it would not add fps that wasn't there to begin with?
I have put the stock valve back in, but wanted to know if I can modify it to push a little more gas? Other than this, I think I will have to order something from Hong Kong, but what?