This was my first of many Jefftron purchases, I think it's better than the Gate stuff.
I have put JVAN gears through the ringer and they will not quit. 41.3 RPS and 1.68J out of a 12:1 SSG. With the relocated tappet pin there is no full auto FPS drop as long as you don't have PME. I have had the same JVAN SSG gearset in a build and swapped motors to go from 41 RPS to 37, back up to 44, and now I have added a 9 tooth bevel to drop it back to 38. Last weekend my Levithan rolled over 100k cycles. 80k was with the same JVAN gear set.
![JVAN SCM440 Short Stroked Gear Set [13:1 ratio, 13-tooth Sector for High Speed]](https://cdn.shopify.com/s/files/1/0606/1008/4957/files/131ssfront_9d20fb74-ee15-4098-888a-95f8fe464109.jpg?v=1761361038)
plug and play into my G&G ssg01, except for that it doesnt fit in the dropstock through the buffer tube or into the small compartment that the original mosfet was in. I ended up just drilling a hole in the compartment and strapping the battery to the stock.
As a programmable mosfet, it works very well and has great features like precocking and active braking with multiple levels.
I was a bit worried about the USPS shipping, but it arrived safely without any issues.
This is definitely the best-looking handguard for the SCAR.
The seller was even kind enough to quickly correct my shipping address—it was a great experience.
Packaging was great. Nozzle was shipped in a small solid tube which prevented any mishaps with shipping. Installed easily, and worked great today on the field. Great air seal with a maxx hopup chamber and 4UAD aeg bucking.
![Airsoft Mutation POM Air Nozzle (21.2mm) [AEG]](https://cdn.shopify.com/s/files/1/0606/1008/4957/files/rn-image_picker_lib_temp_b040906d-63e7-4041-823a-dac2a21beb35.webp?v=1757874926)
Very happy with this spring, I added this and o ring air nozzle and ball bearing spring guide, and these too me from .75J to 1.15J which is perfect since my indoor maximum is 1.2J. Much easier to swap these springs out as well once you change the first one, if you need to go up or down in power. To change the original spring you have to take the whole gearbox apart. To swap these you just remove the buffer tube.
Very happy with the air nozzle, came with an extra O right which was nice. much more sturdy than the stock plastic one with no o right. Not sure about performance gains specifically from this part because I also upgraded the spring and spring guide at the same time, but i got exactly the performance boost from all those parts together that I was expecting.
Great piston upgrade, comparing to the stock plastic one in my cqb r m4, this one is very slightly smaller which was odd, but everything fit back together fine and it works, so no complaints here. However pushing the weight down inside it was quite a bit tighter than the stock one, but I was able to get it in there with some screwdriver pressure.
these dont fit my M4, they are barely too large and cannot be inserted fully into the set holes, I even hammered on them quite a bit but I'm not trying to break my gear box, they do not fit properly. So if these are for other ngrs and not the m4 cqb r they should really specify that, but I know in my gun, they did not fit, I had to put back in the stock nylon bushings.
Sorry for the inconvenience.
If possible, please email us the inner diameter bushing holes and the outer diameter of the Lonex bushings. We would also appreciate an OD measurement of the original nylon bushings so we can compare them with the Lonex ones. Once we have those measurements, we can determine whether the issue is related to the gearbox tolerances or the bushings themselves.
Paired with 4UAD 4UANTUM Friction Pro High Performance AEG Bucking and Nub. 6.05 is not super tight bore or needed. I was told larger bore would be enough and stainless steel doesn’t require as much maintenance. Seems to be working better than my stock VFC barrel so far. Shooting 330fps on .25, groupings are tighter.
This thing is awesome easy to install has a lot of features. only issue I had is that I’m color blind so programming it with the different color LEDs was a bit of a chore but I was able to figure it out
The package was excellent, nothing heavy or abusively large. Well protected parts, and as expected they were a perfect fit.
It fits, it sits, I put a 4aud bucking in and a 6.03 unicorn and I’m shooting lasers at people
This piston is a must have for anyone building a TM MK46. 10/10 Quality. If you’re running the eagle6 anti reversal latch. You might run into some clearance issues. Dremel down the anti reversal latch a little and you will be solid.
Excellent upgrade for anyone trying to beef up their gearbox.
ordered a new magnetic trigger and trigger board. both were perfect replacements. the parts worked perfectly.
note to all damn things are fragile be careful with them.
I like these for replacing stock pads to correct AOE instead of using sorbo pads. The higher durometer ones so that they do not compress and deform during the compression stroke. Superior 3M adhesive pads are included.
When you buy these pre-made gearboxes, its extremely rare for them to perform perfect when you drop it in because of the manufacturer's negligence. If you don't know how to work on all aspects of these gearboxes, something's bound to go wrong, and then your experience is ruined. if you had to question your engineering abilities while you're reading this, don't buy this gearbox. buy a whole aeg. otherwise, if you can tech, have fun saving some money when buying this. Also its perfect for a high rof DSG or TSG, only the sector gear would need swapping. Also mine came with a huge ahh sorbo pad on the cylinder head, no big deal but crazy for RA
Perfect fit for G&G Combat Machine. Lots of room for battery. Nice compact design.
Fit perfect in my NGRS 416D. A must have if you plan to build a NGRS. It also came in a nice silver color which I like more than the black.
This inner barrel was quite lose in a nexxspeed v2 hop unit, so I changed it into a stock tm gold match hop unit with a tiny bit of Teflon tape wrapped halfway around the underside of barrel where the front end of stock hop ends and now theres no wobble at all, descent grouping, nice power boost (goes straight through both sides of a can like an airgun now!),one cool looking TM gold match with highly extended barrel set up and higher end quality inner barrel ! it would be a 5 stars from me if it was a snugger fit without slight modifications , overall am pretty chuffed tho
