So, Ladies and Gentleman, today, I have violated a M4 hop up beyond belief to fit in a VFC SCAR-H. Now, I did this because replacement hop up units are pretty expensive for the VFC SCAR-H, at least for a broke teen. Pics are very soon to follow, as soon as I get a working computer. I'm not going to make this a how too until I actually try it out. My main concern would be really bad compression, but I have hope that I can make this work. Just a notice, this will mangle the M4 houp to the point where it cannot be repaired.