Here's my on going project gun (Although I think I finally made up my mind).
My G&G Top Tech M4 started off pretty basic.
But then I saw all those sweet Magpul rifles and decided "Two ton Magpuled up gun... I think so", and that first pic eventually became this.
But... It wasn't enough for me... And eventually it became boring... Until I learned the fun of impressions!!!
So now its starting its MK18 Mod 1 transformation, and I'm loving every minute of it. Still needs a lot though, but that's the fun part of replicating an issued firearm.