Gate Merf 3.2 not working correctly? F2000 semi-auto trigger not working

[Adolf Hamster]

Quick test fire this morning...
The F2000's supplied mag is feeding great, but the mag that came with my DE M906C is only feeding when I push it up into the mag well and hold it there (it's clicked in place but there's still further movement available). 

Is there a way of adjusting the location of the mag within the gun? 

Is it just a case of packing the mag well to encourage it to stay in a good place, or is there anything I can do to the mag catch?

mag compatibility can be just one of those things, sounds like the DE mag is just set slightly lower than the cyma.

if it works the other way round (ie cyma works in the DE) then tbh the best solution would be using cyma mags.

FPS is down, I wound the spring guide's Quick FPS change screw all the way out, I'll wind it all the way in, see how that does, as 200fps with 0.28's (with some hop) is, I think, a long way from the 345-355fps (with 0.20s, hopped) that I was getting.  Maybe it doesn't like the new nozzle, even though it seemed to fit the cylinder head very nicely.  Maybe it's too short and not sealing against the bucking properly?

one thing to think about is the potential for the adjustment to back off in-game.

the g&g is a different system but the one thing i found happened far too often is it'd back out during a game, you'd start with a nice solid figure and end the day barely spitting rounds.

the fps consistency should show if it's an air leak, a consistent low fps would suggest it's just spring tension but a wider range of values would lean towards a leak.

 

[RostokMcSpoons]

Yeah, looks like it might a small, but consistent air leak
I've wound the spring in all the way, I'm up to 255-265fps with the 0.28's, but that means the the FPS is varying by +-5fps (though it is mostly on the 260fps mark)
So around the equivalent of 300fps with 0.20's.   

By comparison my DE is shooting at 288fps, +-2fps, and that was at a slightly lower FPS than the F2000 before the latest bit of monkeying around.

I've tried my other 'Adventure Line' mags (that I got when I bought my CA AR15 all those years ago).  They feed fine in the F2000 as well, so it's just the DE mag it doesn't like.
Which is amusing and appropriate as the DE does not like the F2000 mag!   Kind of a shame, I like the F2000 mag, it's got a key winder hole in the side, and using the key is much nicer and quicker than using the winder wheel on the bottom of the mag.  And it's longer for a 400rnd capacity.  I'd buy a bunch of them if they worked in the DE.

Mid-edit edit:

Well I wrote all that out, and then I thought "I wonder how much hop there is at the moment".  Answer - lots. I wound it all the way off and the FPS jumped to 292-299fps.  (Mostly fairly consistent at the lower end of that range at 293, but with the occasional jump to 299).  So it's still a bit inconsistent, but it's back up to what I expected, equivalent to ~350fps with 0.20's.   With a bit of hop applied and a cold day I should be nicely under the limit.   And on a warm day I can wind the spring out too if needed.

 

[Adolf Hamster]

ahh yes, the hop'll do that

can't really help much on the mag front it's been years since i've messed around with m4 mags, now if it were an ak that'd be easy

that fps variation could be better, but at least it's playable.

have you an o-ring/spring pushing the hop to the gb? iirc you were querying that to also tighten the upper/lower fit with the body pin?

 

[RostokMcSpoons]

ahh yes, the hop'll do that

can't really help much on the mag front it's been years since i've messed around with m4 mags, now if it were an ak that'd be easy

that fps variation could be better, but at least it's playable.

have you an o-ring/spring pushing the hop to the gb? iirc you were querying that to also tighten the upper/lower fit with the body pin?

Yup, playable.  Looking forward to giving it its first proper outing on Sunday!
 

Regarding the proposed o-ring fix: Everything is solid now anyway... the upper won't budge forward or back, and the body pin is now snug as a bug.  Perhaps the trigger shimming did it, or perhaps the gearbox is better seated within the stock.  Whatever it is, it's a welcome bonus

Many thanks for the trigger unit and COL that just dropped through my letterbox, you're a top chap and no mistake guv'nor ?

 

[Adolf Hamster]

Yup, playable.  Looking forward to giving it its first proper outing on Sunday!
 

Regarding the proposed o-ring fix: Everything is solid now anyway... the upper won't budge forward or back, and the body pin is now snug as a bug.  Perhaps the trigger shimming did it, or perhaps the gearbox is better seated within the stock.  Whatever it is, it's a welcome bonus

As long as the hop is sitting tight to the box that rules out that as an issue.

Many thanks for the trigger unit and COL that just dropped through my letterbox, you're a top chap and no mistake guv'nor 

Np man, might as well have my financial insensibility of fitting titans come to some good

Hopefully if the glue doesnt hold there'll be a col to be a bit more long term.

 

[RostokMcSpoons]

Just gave it a few long bursts in the garden, all feeling good at the moment. 
Obviously my main hope is the hop unit / bucking / nub are going to do a better job at distance than the original unit.  I won't be absolutely sure until Sunday.