It just adds a little weight to the gun, but not a horrible amount.
I honestly like this product because it helps me get more comfortable with my gun. It does make the gun a little more heavier, but not enough to make you not want to get this part. It is the best drop that I have used so far in playing paintball even though it has only been a month of me having this drop foward.
I would recommend this to anyone that is looking for a good drop for their gun!