yes it uses normal AEG springs, but you would need an upgraded sear to use high power springs (there are non for the SVD). i have heard of people having some luck with M150, but i think that might be the extent of the sears ability to hold a spring. try going with an M140 spring and a TBB, depending on the quality of your Sear and hop up you got in it. i hear the hop in it is junk so you might just have to stick with stock parts for now until other companies decide to make upgrades for it. other than that in the mean time waiting for upgrades (if they come) try getting wood furniture for it to make it look more awesome