Yeah, shame about that sleeve. Makes barrel swaps tricky.
Because I sliced the outer barrel off the front of mine and subsequently came down with a severe case of slicer’s regret (yep, you were right, BME… should have slept on it 
), I bored out the front sight assembly to accept a 14mmCCW pistol adaptor.
I’m liking it more without the tri-lug and it’s a little neater I think… only accepts a 9.0mm barrel though so had to whip the barrel end down by 0.5mm to suit 
Be nice for my ocd if I could get it like this
Do able with a bit of time and effort. Just to get that look. It must be correct
I’d even hack a mag in half if I could but that’s a pipe dream I think.
Well, the good news is the mags would be easily shortened… inner assembly inside an outside shell, secured by a base plate and screw. 
Would hold bugger all gels though… not that it would matter for the sake of the look.
Updated with 200mm barrel and 1.18 Ausgel spring. Fits in suppressor
After barrel stabilised
Lets see how long this lasts
Thanks that’s cool. Yea I’d only do one for fun and rest left alone
@Wombat interesting… good result. very consistent numbers and decent too. 
I just did a similar thing with mine, but the barrel extension is part of the suppressor, so I can revert to short at any time. The extension seals against the short barrel in the 14mmCCW threaded adaptor… screw on, screw off.
Without suppressor about 200-210FPS
With suppressor about 260-270FPS
No doubt I’ll lose a bit when I trim back the suppressor barrel for a hop up. But if it hangs around 250 I’ll be happy.
Good solutions, both of them.
confirming that “some” other LDT parts will fit such as the SEF lower. Safe and full auto work well however the fire select for semi needs to be just a bit before it clicks into semi with the LDT selector plate. Everything is very tight and has made the middle body pin harder to get in and out.
I love the idea of the suppressor giving that little bit extra length. I would be looking at either 3D printing one with a 7.5mm barrel incorporated but what will allow screw on to the existing stock barrel end. From memory is it is 14mm CCW.
Also I have a spare Kriss Vector (early model) silencer that is threaded - I am wondering whether it will work to give some extra length.
Alternatively, rather than reinvent the wheel would the likes of the following be successful as an example - inclusive of internal metal barrel:
Depends on the threads… vector barrel muzzle thread were clockwise, while everything typically is counterclockwise.
If printing it just mirror the model.
These Osprey kits have very annoying thread handing… tightening up one thread loosens the opposite. 
@BME bought one recently, he should be able to give you the good oil on them.
I can never follow these threads - trying to see if the original JM MP5K end is clockwise or ccw, and then if the corresponding part mating to it needs to be the reverse when ordered.
The JM MP5K outer barrel’s a combination tri-lug adaptor and 14mm CCW thread.
So any attachment with a 14mm CCW thread will fit it… which is pretty much 99% of all supressors, flash hiders, tracer units, etc.
Or you could be extravagant and fit a supressor that attaches to the tri-lug.
Thank you Friendly Fire. I was reading (granted on CEH) that the JM is 14mm negative or clockwise on the blaster, and there assumed a 14mm CCW suppressor would work.
Again very confusing - screwing something in and not over seems simpler as to direction of thread.
No problem, just match the thread…
A negative or reverse thread is CCW.
CW = clockwise = right hand thread
CCW = counter clockwise = left hand thread
Most rifle gel blasters and SMG blasters will be an external 14mm CCW thread, pistols will be different, usually an internal 11mm or 12mm thread so an adaptor is used to make them compatible with attachments. 
Friendly Fire - Just so I am Crystal you are suggesting the JM model is counter clockwise so find a CCW threaded suppressor and we are good.
Yeah, not a suggestion, 100% confirm there’s a 14mm CCW thread on a Jin Ming MP5K outer barrel. Most threaded barrelled gel blasters are threaded as such.
So yes, any muzzle device with the same 14mm CCW thread will screw onto it.
Just make sure you don’t try to screw it on the same way you would screw on a normally threaded item, the rotation is opposite, i.e. counter clockwise.
Not “righty tighty, lefty loosey”… it’s “lefty tighty, righty loosey”. which is what makes those Ospreys a pain in the arse. The centre tube screws in CW, the attachment collar is CCW so when you tighten up on the barrel it tends to loosen off the centre tube.
Loctite helps.
So does putting an o-ring at the end of the thread to cushion the vibration when the base of the suppressor is screwed against it
There was a few different model blasters like this that used to do my head in 
Tightening attachments would unscrew the barrels and some different adaptors 
The glue or O-ring trick made it a bit easier to keep your sanity for sure!
