A person at airsoft is selling a M4 CQB for $100 and this is the reason I would like to have it.

I’ve been having a dilemma. I want my gun to shoot around 280-300 FPS so I can use it in the crates without people complaining about how much it hurts. But at that FPS, using it in the field wouldn’t be that good. Why? Because at that low FPS, the range wouldn’t be that good and it wouldn’t be able to penetrate through some of the leaves, bushes, etc etc.

I have been thinking about getting that gun. For a few reasons. I would take the gearbox from it and put it in my current M4. Mine has a longer barrel and the gearbox that he has in it shoots harder so there would be the range and penetration to use it in the field. I would put my gearbox with the Modular gears and a M90 spring (which would give me 280-300 FPS) in the body of that gun. It has a shorter barrel so I could use it in the crates without worrying about it being to long and heavy. (Which i am facing now.) Also. If that gearbox has 7mm bearings, we wouldn’t have to buy a gearbox shell. I would just take the internals from the gearbox that is in there now, and put it in my G&P gearbox. I could probably get it for $100. So instead of spending $60 on a gearbox shell, I could spend $100 and get a whole new gun and fix the one that I have now. (That is If the gearbox is 7mm.)