I have an A&K svd and it was double feeding bb's quite often until I fitted the ASPUK hop up and then it worked perfectly.
The A&K uses AEG parts which means you don't need pricey sniper bits. Also on the svd, if you break your scope, you can resort to using the standard iron sights.
I will also say that you don't need the svd type sights, I fitted a regular 4x40 scope which gives superb clarity and light gathering abilities.
On the l96 and others you have a 28/30 round magazine, the A&K svd has 60rnd mags and these have metal outer casings.