Very good detail i wish you can make it on the HL2 Grenade like a replacement

Not bad, but it could certainly use some more detail, also the dimensions on some parts look a bit off, particularly the metal cap at the bottom seems too short. Also, the handle looks wider than it should be. Not trying to demean your model, it's good, just saying it could use some work.

looks pretty good for a first time

Thanks :)

You did a great job :D

Very nice!