Browsing the newly released Street Lethal source book, I find some very high strung SciFi stuff like (Anti-)Grav Drives (Not for runners to purchase), some nice additions for Small Unit Tactics maneuvers and lots and lots of vendor trash weapons that come with one gimmick that isn't really worth it or awesome but impractical.
That said, there are a few real gems in it:
The Winchester Airbow is a gun that shoots arrows - and therefore an ideal weapon for alchemists who aren't trolls.
LONE STAR’S BATES-BROWN TACTICAL COMBAT BOOTS have insane AP -4 with STR+2, are legal and down't occupy your hands. The ACC of 4 is bad, but once you turn them into a weapon focus and add the correct bond, that limit is no longer an issue.
Finally, there is the red dot sight, giving you +1 ACC and +1 dice at short range without needing to be wireless.
Honorable Mention to the PSG Enforcer Sniper Rifle that's just a bit more expensive than the Cavalier Arms Crockett EBR, doesn't have BF, but has -4 AP, making it a prime candidate for SA Bull's Eye Burst.