In my experience they are the only drums that kept up with the performance of their stick counterparts!
And totally acceptable as their stick mags hold stuff all gels!
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That’s what I found, was some guy said nope they are crap and don’t work. I said oh well must have got a dud as highly recommend them for more gel capacity for game day. Less reloading with the stick mags etc.
Robust Nylon? I think too so good for a bit of bump and scrape.
When the Wells kicked off, I was all over those drum mags too, dare I mention Wells LMAO. They work fine for me, Pop the window open and pour your bottle in on the fly and slayed my mates son that was being cheeky. Ohh that’s not fair, you’ve got endless gel supply. 
Good times. Mates son got me square in the rear end, right here comes the pain train kiddo haha.
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The wells drums worked well too actually.
It’s more the gen8 mag pattern drums that suck.
Purely as they just aren’t as universal as a gen8/SLR mag is. All my m4s have no issue taking gen8 and SLR mags, yet both those drums fitted say 6 out of 10 on average.
Sure I could mod to suit, but then I’ll likely lose the gen8/SLR mag compatibility.
And further since nearly all my stuff is higher than stock rof, it is a plus to give them a rest while reloading stick mags!
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I had some friends with those double drum Gen 8’s and they had no end of troubles wouldn’t feed even 3/4 full. I never bought them after I see them fail on game day and a lot of others mentioned it here on the forum.
Haha yeah they were the worst… primarily because they had slower intermediate gear type but also had a dirty great resistor in them… remove that they were better, replace motors with high speed and they were ok.
They were a convenient design, but get real sick of pulling them apart before a game to clear out all the shrunken gels!
All I’ve got to say is yep. I got sick of it. Burnt a heap, here’s how you fix it
Another week, another video!
Thanks BME for letting me review this.
There is another video for this on Sunday.
Back to one video a week for at least a month after that as I won’t be in the country for much of that month!
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That’s the one I’ve been waiting for, matey 
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interesting point on the Si-jun blowback…
it can be " disabled".
cocking lever all the way back, and locked up.
Ejection port opens, and stays open.
No more cycling upon firing…blowback disengaged.
cocking lever forward, and it reengages.
So, it has a nuetral posn.
Weird…!
That is interesting. I wouldn’t run it like that if I were you though.
Can’t imagine it would do that cocking spring a lot of good being fully stretched all the time. You might find that if you did that a lot when you did release your cocking lever it’d stop somewhere short of fully forward and rattle around. 
You know what Chinesium springs are like.
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I’d prefer the springs to sag than the charging handle to break- which MP5s of all types are notorious for!
And TBH, MP5s have the best most reliable blowback. That doesn’t say much for blowback, but the fake bolt is very well contained and guided, and not too heavy.
When someone says they want a good performer that has blowback, the MP5 is my top recommendation. …well my top recommendation is to not worry about blowback!
I never really touch the cocking handle on my MP5s.
The “H&K” slap’s a great way to guarantee eventual breakage, won’t happen overnight Rachel, but it will happen… and if it doesn’t function as a mag prime I see no point other than a bit of theatrics.
I’d prefer to have it held tight at the front looking cool than broken or stopping a half an inch short.
But one man’s meat, etc, horses for courses and all those other platitudes. In this hobby, you do whatever trips your trigger… literally.
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