I got a few… ehem, somewhere in the pile 
I think I have one… Maybe two left of them too. Went in many of my blasters once!
But how can you solder it if you’re never to use soldering gun?
Soldering guns are more of a heavier duty used for bigger things. Soldering irons are for smaller more precise jobs
M210 max spring?
How was the sijun mcx 89-2 performance? I found it at my local store and their price are quite affordable for a beginner like me, and also i heard i can just use the jingji slr mag with the mcx. It would be very helpful to me if you would share your experience using it.
Hello everyone, does anyone know ab successful cases of making DIY magprime using the pull handle to Sijun HK416D 3.0? Yeah i know that in version 4.0 there is mosfet fire control and in theory it can be added in mine, but im a bit of scared of disassembling this metal split gearbox, the blaster itself is bit of a pain to disassemble. If there are such cases can anyone please hint where you put the microswitch?
most cases just a auto priming mosfet is the best and easiest solution these days.
Not a lot of SiJun here in the land of Oz, so not something I have seen discussed.
You will need to place a momentary switch that is activated by the charging handle, which will likely require modifying the charging handle and gearbox.
Then run wires and a dioide to it… All while finding somewhere the wires wont be ripped by the upper receiver when installing that.
Personally I gave up on bothering with it on V2 style gearboxes some 5-6 years ago as there is too many hours of figuring it out, ruining switches/charging handles/and gearboxes in the process. Also most blasters starting coming with mag prime built in or mosfets doing it anyway.
While a handy feature, it’s often far more headache than its worth when you can just pull the trigger a few times!
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Getting in the habit of filling the mag feed tubes to the retainer’s a good practice too with blasters that have no mag prime function.
Do that and you’re usually firing gels on the second trigger pull on semi anyway, and definitely necessary on low volume stick mags… MP5s, etc. with or without mag prime.
No mag prime’s never been a deal breaker for me. 
Yeah man, thanks to this thread i figured out mechanics of doing it, bought the diode, wires and microswitch, even decided how to modify pull handle (cyanacrilate glue + table soda for a little bump that activates switch) but yeah the placing of the actual button and wiring (not to mention it must be separable wires because of a split receiver) and it is a real pain. My previous blaster was TG F4 Ar15, and i thought it would be as easy to implement as there. Thanks for your reply