Simple addition to give hair trigger response. I liked it so much I have added to all my two Leviathan gearboxes.
This product while seemingly good in quality, unfortunately lacked the 1 thing I needed for it. The abillity to fit in the replica it was designed for. I tried and failed for an hour to slide it down the outer barrel with adjustments to anything that could and due to the tight tolerance nature of this product it did not ultimately fit. I want it to be know I dont hold the seller liable for this issue as ive read online its a well documented issue this chamber is not a guaranteed fit despite it being designed specifically for the replica. The tolerance from barrel to barrel id imagine is varying per replica and I unfortunately drew the short straw on mine. Oh well you live and you learn, otherwise great service from the seller!
I’ve had this barrel for several months now and I’ve been able to put a few thousands rounds through it. This barrel combined with a Maxx M4A hop-up provides amazing accuracy. I’ve been very happy with its performance. You can never go wrong with a Japanese barrel. You’re getting a high quality inner barrel at a reasonable price. I’m also a fan of tight bore barrels because you can usually achieve your desired FPF or joules with a less powerful spring thereby improving the longevity of your gearbox. Just make sure you keep your barrel clean.
Just a heads up, it does not fit in a VFC MK18, but it does fit well in a VFC HK 416A5, otherwise it is a well made hop up.
The MKII 556 has two components, the outer shell and the internal tracer unit.
I loved the outer silencer shell. It’s very well made, nice quality and looks great. However, FDE color was a satin bronze color and not FDE. I painted mine.
The tracer unit works well but the battery is a big issue. The tracer unit has no “On” or “Off” switch! It automatically turns on when it senses movement and then goes to sleep mode when movement is no longer detected after 5 min. This means it never turns off and is constantly drawing a charge. The manual says you must charged it every 2 months. If you forget, you can drain the battery to the point where you can damage it and it won’t work again. This is ridiculous. There is no battery replacement. If it dies you have to buy a new internal unit and they are not cheap. Tracers are not used frequently and they should have designed it for long period of time of inactive use. That means giving it an on off switch or easily replaceable batteries. This was a poor design choice.
It would have been nice if they included silencer foam for day use.
Held up perfectly after 15k+ rounds with the EPES POM piston head. The grub screw design is helpful in prevent the CH from wobbling in the shell. Just wish I got the extra fit version for less nozzle wobble but thats my fault.
Super strong rack and body. Meshes perfectly with T238 and JVAN gears. I was able to crack a part of the body because I forgot to loctite my piston head screw, so it's definitely not indestructible. But when installed correctly, there are no signs of wear after 15k+ cycles.
![Airsoft Mutation Jaeger Lite Piston [Standard, Full Rack]](https://cdn.shopify.com/s/files/1/0606/1008/4957/files/DSCF9325_b2defe46-40bd-4aa3-86ef-b7b19dcc7a9c.jpg?v=1782233422)
Even after selector calibration, there are times when it has trouble registering that you are trying to enter programming mode. Unplugging the battery and reconnecting helps, but it gets a bit annoying sometimes. I've been able to replicate this with 4 different units, including one that was preinstalled OOTB. I still choose this ETU because it can't be beat for the price.
![Perun V2 Lightning ETU [Back Wired]](https://cdn.shopify.com/s/files/1/0606/1008/4957/files/photo_LI-V2-BW.jpg?v=1775256628)
Nozzle diameter measured out to 5.37mm so even with a VFC m4 nozzle, there was still a bit of nozzle wobble. It fits very tightly in my SHS cylinder so the CH itself does not wobble in Retro Arms GB shells. Just wish the nozzle was a bit thicker
I received my boxmag and connected a battery to it, but noticed immediately that it would not turn on with the rear signal button. I took the backplate off and noticed that one of the 2 solder joints to the signal button was broken. This is likely due to how tight the wiring was I believe the joint was under pretty heavy strain.
I added an extension wire with another JUST plug for the button and re-soldered the switch which is now working. Product improvement recommendations would be to give more length to the button wires to avoid excess stress on the tiny on/off button.
Everything else is a waste of money. If you want your PKM to work and work well, this is the product to purchase. BBs on demand, keeps up with rate of fire even if you've upgraded. I'm running 16:1 gears and 35k brushless motor at 30 rounds per second. It's absolutely beautiful. Or terrifying if you're on the opposing team. Install couldn't be easier; it's totally a drop in replacement. Easily fits my 3200mAh battery for the gun and a 1200 JST lipo for the box mag. There's an on/off switch that's accessible through the bb fill flap so you can get your mag inserted before turning it on so you don't start feeding bbs all over the ground.
Just perfection like always, i have another replica with this gears for intesive use and never failed
This is genuinely worse than the first iteration of bullgear RPK inserts. Besides the lack of details on function, the motor shaft to feeding wheel is only secured by a single metal bar in the plastic wheel, which spun out during testing.
The entire feeding wheel assembly is plastic. This mag is just direct wired with no automatic cut-off like the bullgear, or included switch. I presume the intended purpose is to hooked up to the main wiring directly. Which is kinda absurd considering even the first gen bull gears had pogo pin connectors for the magwell.
Do not buy, just get the bulllgear one.
Dope
Great premium product, support and fast shipping! My items normally arrive much faster than orders from other vendors!
I absolutely loved this amazing part and used it in a recent build hitting 33 rps with this incredible part and its super light keeping your build fast. WOULD recommend to any new tech like me
