Silent Buffer

thingiverse

Hey guys, check out this sweet mod for GBB M4s that I think would be really cool - it's based on the JP Silent Captured Spring design. This thing is supposed to help reduce bolt bounce, eliminate the annoying spring-rubbing-against-buffer-tube noise, and make the cycling action super smooth. This mod will only work with bolt carriers that have a hole in the back like the GHK, VFC, or RA Tech bolt for WE M4s. The three weights on the cylindrical part are key to making this thing work right. I tried to keep costs down by using widely available off-the-shelf parts and minimizing custom machining - for example, the end piece is based on a D25L30 stepper motor shaft coupler, which just holds the linear shaft in place and provides a pocket for the spring. The only custom part that needs to be made from POM (polyoxymethylene) is the face piece, and even that only requires turning. Despite my best efforts to keep costs low, this mod still ended up being pretty pricey - around $75 for the whole thing. Finding the right-sized weights was also a real challenge, but that's something you can easily modify if needed. I thought about 3D printing the face piece, but I don't have experience with different filaments and infills, so I opted to share the files instead. I'm hoping someone with access to a lathe can pick up where I left off and take this mod to the next level - maybe even bring it to market.