The things that instantly caught my eye were that the bars are not centered, which does not look like it's made on purpose and the ammunition amount "splats" the weapon icon. Other than that, it's good that you've done some work, like with the sounds and all, since it's easier to upgrade a lot of work. You should work more on the aesthetics, that is the most important part in a new mod imo.
You can improve it a lot, and if you can, it means it's not ready
. Being your first mod is not an excuse, my first mod got quite a good welcome (unless you all lied, of course). Happy modding!
No rate, since you can still work on it.