You have to cut it a little bit if it's the Marui MK96 you're on about. The cylinder is slightly different to a WELL L96 I believe.
Airsoft Forums UK
DEDSEC
DEDSEC
And WELL L96's are up pretty much entirely VSR compatible.
Unrustle_Thine_Jimmies
WELL L96 Are APS Type 96 clones,shar zero compatibility with the VSR. TM L96 AWS is VSR compatible in the trigger and cylinder internals.
Monty
Cool, cheers for the info.
C
clumpyedge
just go on airsoftsniperparts and you can find all you need on there 
