Pros:

it adds 50 extra bullets 
gives me resverve ammo so i can actually use it longer

Cons:

like other poeple said try creating your own actual animation other than that it was great

Conclusion:

Its really cool i love the m60 one of my favorite weapons in game especially with Gib Fest. but i think mabe in the future try to make ur own animation that would be really :)