I don't see why you would take a M4 carbine and add sniper attachmens to it without doing a barrel modification? Plus the parts just don't look like you took the time to put them together nicely; for example the pistol grip doesn't match up, the handguard looks like it's only one half of what you need, you wouldn't put a full on sniper scope on a carrying handle, and the delta piece between the reciever and handguard desn't look right, and the upper reciever doesn't match up with the lower reciever.
Also, I saw that ninja
Told you I didn't know much about guns, although first of all it wasn't M4 carbine I modded, it was M16A2. Feel free to correct me with "But the M4 IS the A2!" if you want, because I have no idea.
Yeah, I had to make the hand guard 75% scale because of how short the barrel is. I didn't know you weren't able to put a full scope on a handle. Upper receiver, lower receiver...I have no idea what you're talking about, except I looked in the parts for them and it appears to be the handle and the lower part under the handle, right? If so, that's unchanged from the A2. I think I screwed up the bolt on accident, though. Delta piece is that little silver bar, right? Yeah, I messed that up too. I used a different pistol grip just for the sake of originality, I guess.
Ninja? What're you talking about?