The forearm on an SBE is much shorter and compact than any of the newer gas guns so it might seem there is more out front but that's only because there is. Barrel that is. There is quite a bit more barrel past the forearm of an SBE than most gas guns of comparable barrel length.
SBE barrels are smaller diameter also. Thin, light, point well and swings fast. Weight out front helps with follow thru and there ain't much there on an SBE but practice at the gun club is even better than weight. Practice - better than any gimmic I know of.
Also, all recoil reduction features on an SBEII are aft of the receiver. Not much of anything to create weight out front.