airsoft m4 hop up hutu hopup tracer unit

thingiverse

<iframe width="560" height="315" src="https://www.youtube.com/embed/SVMKxuZLZYg" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>https://youtu.be/SVMKxuZLZYg Just installed holes for 5mm LEDs, preferably ultra bright UV or Blue. Untested as of yet, but will be trying in the near future. One version has 5mm holes and the other has a 3mm lip to prevent the LEDs from going in. *Edit 07292020- Installed one for 3 LEDs instead of 6 as 6 may be a bit tricky to fit and wire into the upper. Still, could work, but looking at it, I think 3 would be easier. Have a front wired gearbox right now so had to leave some space for the gearbox wires to go through on the left side, so just put the LEDs on the opposite side. You're gonna probably need to watch a few DIY vids on YouTube before tackling this. If it works, it's super cheap to do. Will definitely have to grind the LEDs down first and the one closest to the magazine will probably have to be glued after the first 2 are glued and dried so you can make sure the BB has a clear path. Another tip is whenever you grind the LEDs down, if you don't have a polishing wheel to shine them back up, you can use a little clear nail polish. It'll smooth it out and make it clear again. Also, for the top 2 LEDs had to grind off the little lip on the bottom of the LEDs in order to push them in further. I used a 300Ohm resistor because I had one laying around. -Update 8/1/2020: IT WORKS!!! Problem is the bucking doesn't fit into the hop up so just went without bucking. Put a fat rubberband around it so the arm on top has something to press against and a little more resistance since I don't have a full air seal.... Nonetheless, they glow and shoot and it looks awesome. Will be posting video soon but don't have a clip yet. Did find out the inside of a cheap ink pen is perfect for the BBS so glued 2 together and put a long screw in one end to gravity feed the BBS into the chamber until I can make a clip. -Update 8/19/2020 Working well. Used a dollar store tactical flashlight to make a handguard grip. Just cut out the LED from the flashlight and used the resistor that was already attached. This was wired to the hop up so that I can turn it on and off from the flashlight. Then mocked up a Picatinny top to accept the flashlight. All the asthetics and stuff don't really matter as I'm sure you will all do your own thing. But the 6 LED one works and works well. -Update 10/1/2020- Made the one with 6 LEDs and only had 1 blue led so used that one closest to the air nozzle on one side and used 5 UV LEDs in the rest of the holes. Wired all that up to another dollar store flashlight, but this time just used the resistor in the flashlight. Used the dremel to take off the end of the flashlight, then mocked up a cap for it, painted it and attached it to the rail. All the asthetics and stuff don't really matter as I'm sure you will all do your own thing. But the 6 LED one works and works well.