Lozart

Ha! The ongoing chase of ever decreasing circles eh? That said, if it is new old stock I've not really had any issues with mag compatibility with any of my Maxx hops (using PTS EPMs and, rather surprisingly, Nuprol mids).

Personally, I'd be tempted to get a small bottle of some different ammo and see if it does the same thing (same weight, different manufacturer and different weights too if you can swing it - maybe ask a buddy if he has some spare he can let you try). You could try swapping the hop rubber, I'd usually suggest a Maple Leaf but the Krytacs have a weird nub so I'm not sure it'll work without changing the arm a bit and then you could be introducing other problems.

He's made three posts and disappeared. I think our work here is done.

I mean, if you want an SMG, just get an SMG. Why buy a pistol and negate all its design benefits?

The TE was the model before the current one (ME) so if it's an actual knock off not just old stock then it's based on an older design. That said, I have a genuine Maxx TE hop unit and it's been great for me.

There's this one for AEG https://locknloadairsoft.com/products/copy-of-vfc-hk-licensed-mp5-front-sight-sling-loop-replacement (ignore the description in the link it's not for a sling loop!) Or this one for GBBR https://www.mlemart.com/vfc-magazine-catch-set-for-umarex-h-k-mp5-gbb/

In terms of other BBs I was more thinking of trying a different weight to check if the mags are struggling for some reason. If the hop is working well with your 0.28s then I would tend to think it's OK. If it was torn they'd be all over the place. When you get a shot that drops sooner, is it definitely just one BB or could it be double feeding?

Do you have any other BB's you can try it with? Does it happen in semi when you fire quickly or does it happen when you fire it slowly and deliberately (ie not spamming the trigger). Is it completely fine in Auto?

Gas or AEG?

Sounds lik it's performance is about on par with a £150 second hand gun. Checking the hop rubber is always a good place to start but before you do, do you know what the original owner has done to it in terms of modifications? Could be misfeeding every now and then. Does it always happen with a particular magazine for example? Have you made sure you've not got some different weight BBs mixed in?

Yeah @L3wisD what's the deal? Hmmm? I'd say that you could get 3 guns in that package. WHAT AREN'T YOU TELLING US? WE WANT THE TRUTH DAMMIT!!!!

(tongue firmly in cheek by the way)

I have their MK12 suppressor and it's LOVELY!

That's almost word for word what I was going to say.

It's why they pay me the big bucks. Mind you, once the paint wears off there's a bajillion aftermarket slides and frames for the hi-capas so you can have whatever colour of shiny your heart desires!

Answered your own dilemma there!

I'll tell you what I was told when I asked the exact same question when I was looking - get the 5.1, there's way more aftermarket bits for it. Of course, if you plan on running it stock it doesn't matter.

Honestly, if you're planning on keeping the guns for a while and using them get a better charger. The one I linked to is £25ish and it'll help your batteries last longer!

Pretty much. Also - look into getting a balance charger. Something like this would be good https://hobbyking.com/en_us/accuell-s60-ac-charger-uk-plug.html

It's a bolt hold open catch. I need one for a build I was doing (based on an E&C gearbox and receiver) and the only place I could find one in stock was New Zealand. This is the part https://www.evike.com/products/45687/ but it might be worth checking with @ak2m4 to see if he has any kicking about.

@TheFull9 this sounds like it's right up your Strasse!

As far as 22 AWG goes: So yeah, it could easily be pulling high currents. Thing is that to get high current you need a low resistance or a higher voltage, both of which are contradicted by the other fault you seem to be getting. I'd disconnect the box mag and see what it does without it.

Not sure why the box mag would have a mosfet in it? I'm also confused as to how you can be getting low voltage, high resistance AND high current. I'd try checking what current the motor is actually pulling though as it may be higher than you're expecting.

100% this.