Airsoft Svoboda Barrett M107 Shell Ejecting Rifle with 3d Printed Shells скачать в хорошем качестве

Airsoft Svoboda Barrett M107 Shell Ejecting Rifle with 3d Printed Shells

This video is a successful test of the new Svoboda Barrett where it is powered by a remote line. From my reddit post: Shells are designed and printed by me. Took loads of trial and error but got them to work with PLA+ filament. The main trouble I had was the action was so violent it was ripping the rims off the shell causing failure to extract/eject. You can see a few failed attempts in the background. I changed the base print pattern to be stronger and had to change the geometry of the rim to reduce stress concentrations. I also had to print the bottom 90 layers solid or else it would rip the shell from where it transitioned to infill pattern. The shells are just under 13g each. I can also adjust the number of BB's in each shell to turn this AMR into a Shotgun. Previous experiments I did had up to 8 bb's. Lastly, I want to rant a bit about the gas system. If you have seen videos online, you may notice that this rifle tends to jam. Here is why. The gas system of this rifle isn't a traditional system where the bolt cocks a hammer back and the trigger releases the hammer to strike a gas valve. Instead, the trigger pushes a gas valve directly and at the end of travel the mechanism would release the lever pushing the gas valve. So in effect if you pulled the trigger too fast it would not release enough gas to cycle the bolt fully. You have to pull the trigger slowly for it to cycle properly. Considering the travel distance of the trigger and the weight this is pretty hard to do consistently. Plus the bolt travel speed is pretty slow. If it was faster it would be less of an issue but the bolt weighs a ton. Probably heavier that most pistols. As an experiment I wanted to see what happens if you just prevented the trigger from traveling too far where the mechanism resets. That's what the yellow block behind the trigger is for. It keeps me in the sweet spot to release gas. As far as I can tell this has no downsides. There is a mechanism that cuts off the gas if the bolt travels far enough. I don't know why the manufacturer designed the trigger like this... With this mod I was able to use a regular HPA tank to reliably power the gas system. Prior to this I used my SHP tank that outputs 1,050 psi to give more pressure to power the system and even then it was still unreliable. Through slow mo footage I could clearly see that the bolt wasn't traveling back far enough to properly feed shells. In addition, the reason it took me so long to get to this point (10 months from when I last posted about the Svoboda Barrett) was because the trigger died. IMO it has a huge design flaw where the lever that pushes the gas valve is fulcrumed and held in place by a single small screw. Overtime the screw backed out, bent, and the mechanism couldn't trigger the gas valve properly. I 3d printed a shim to keep the lever in place and it now pushes the gas valve properly. Sadly my local indoor field closed so I won't be able to field it anytime soon. I also have the V3 Rare Arms AR-15 on the way. I'm hoping the updated design is more reliable.