[Hectic]

i think i.know what your problem is. Its a gspec. The short barrel in the gspec had a negative effect on fps. The cylender in the vsr is perfectly matched for an inner around 500mm, shorter barrel = wasted compression = low fps numbers (hence why once u increase bb weight your losses are far less) try some 36's see how those work for you. Ill try to dig up the link for a custom build a guy did with a gspec. What he did was shorten the compression (by porting the cylender) the shorter he made it, the less waste the higher the fps.