I run a Guarder 6.02 and compared to a stock TM 6.08 I've noticed a difference in effective range/accuracy (that said, I also did upgrade the spring while I was in the gearbox as well). It's not a pronounced difference but I like it for what I paid for all the upgrades. If I had the chance though I'd probably have tossed in a Prommy or EdGI in there.
I also run .28 Matrix BB's in my gun (can anyone confirm that these are Airsoft Elite rebrands?).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE