Purchased from iHobby
Shipping express via Australia Post
What’s in the box
Chinese and Chinglish instructions
The contents
Couple of surprises
- XT30 11.1v battery
- magazine coupler
Out of the box performance
5 Likes
Some build features
Magazine well
Magazine contacts
Rear of gearbox
Muzzle
Inner barrel does not protrude past outer barrel. Outer barrel has 14mmCCW thread for accessories
3 Likes
Making Game Ready
Removing back plate with QD sling mount - push out pin
Installing LDT folding stock (very tight fit)
Small battery is installed in foregrip. Foregrip removed via pop-out pin
Add top rail, reflex sight, ihobby screw on hop-up and suppressor
Comparison to shorty CYMA - previous CQB blaster
4 Likes
Initial impressions
Pros
- good quality nylon build
- really accurate over 12m
- will reach 30m with hop-up
- mag prime on charge handle
- tight tolerances (mag is stiff to insert in magwell)
Cons
- fire select doesnt have strong detent to hold semi-position
- mags are a pain to fill - hard to get door open without a tool and door is small that need a funnel to fill (will be a problem in game with limited mag capacity)
- inner barrel doesn’t protrude past end of outer barrel limiting hop-up choice
- ihobby don’t appear to have mags (different to previous JM MP5)
Overall - good value blaster. Will give it a couple of games before investigating springs, etc
5 Likes
Nice overview, Wombat… good job. 
looks good with that side folding stock.
Looks like Jin Ming’s upped their game with build quality.
The fire select’s ambi, yeah? I’ve found that disabling the right side and just running left side fire select easier to live with if the setup isn’t crisp. It can always be reinstalled later on. 
Interested to see how you pimp it further. 
1 Like
Assuming it’s a generic V2 gearbox. Can’t be any worse to work on than the LDT one.
For less than $200 it’s looking like a nice bit of kit, also depending on how much mags will be when available.
Love the MP5 platform, been wanting a nice MP5K aeg since I first got the HQ MP5K kit way back when that took a gen8 gearbox.
Also looks like with a couple of springs could be adapted to make LDT MP5 mags work… as I have heaps of them already, I might have to give one a go. Jin Ming have always been a good budget blaster but it looks like they have stepped up a bit.
1 Like
Went to upgrade spring in the MP5K. Spring is smaller diameter and shorter than a normal V2 spring. Picture shows MP5K spring on left compared to M100
Spring change is easy, with the correct spring
1 Like
Did it make much of a difference fps wise.?
Standard spring won’t fit.
When I get more time I’ll cut down a spring to similar length. Need to recheck diameter because it is slightly smaller than standard spring
Spring is the same as the old BF MP7. 13.5mm diameter vs standard 14.4mm diameter
1 Like
Swapped upgraded spring from MP7
Standard spring
Max 194.5
Min 173.5
Avg 188.8
With upgraded spring
Max 213.5
Min 183.0
Avg 197.6
No real advantage of spring change. Back to stock
Looks like some air seals and o-ring upgrades would have some good improvements
Pretty much the same fps as the MP7 until a longer barrel was fitted that matched to the cylinder
Do they come with a ported cylinder from factory?
MP7 with old MP5K spring does 215fps consistently with 200mm barrel. MP5K has 150mm barrel. A 200mm barrel with AKA hop-up would fit MP5K with suppresser. Doesn’t look like a ported cylinder by MP7 is ported
A portedr cylinder would obviously be a massive improvement for these models 
Yeah, agreed. The LDT’s mildly ported at around 80% so we’re planning on trying a few ported cylinders out on BME’s LDT once we get the FPS up to a respectable level.
Should pretty much translate straight across to the JM.
Not good news. First game in out of the box configuration and gearbox has failed. Back to ihobby
I tried my JM MP5K tonight for the first time and nothing. Magprime works, but trigger wont move and grip got hot quite quick. Pulled the battery straight out and it was hot too.
No movement in either semi or full auto. Gearbox issue?
Have emailed retailer …
oh … i didnt even read this before i posted. FFS !! - thats an appalling sign, 2 in 2 mins 