Hi there, I'm pretty new to Airsoft and I was looking for some help. I recently got this hk416 AEG from evike and have some questions: 1) I wanted to put a mock silencer on it but after detaching the orange muzzle flash hider, I noticed that there was no threading to put the mock silencer in place. What can I do to resolve this? 2) I also got this ctr stock from Amazon jp. But it seems like it doesn't fit because it gets blocked halfway when I try to put it on( yes, I held down the lever thingy too). Do I need a different tube to fit it? 3) I want to make certain parts of it a different color, like somewhat yellowish but I don't know what paint I can use with the color im looking for. Any recommendations? Thanks for any views and replies!