If you're asking why I initially got the M80, it was for a flashlight, forward sling mount, dual shell holder, and vert grip. But the dang thing was so heavy just by itself that I only wound up putting a vert grip on it. Even then it was too heavy (the M4 is already a pig by itself). So I removed the M80 and went back to the factory handguards. Don't have a flashlight on it at the moment but could figure something out if I had to.
Like I said, the M80 is just too heavy. Carriercomp needs to come out with a titanium railed handguard or someone needs to make a quality polymer railed handguard.