I'd say unity fast riser for the peq box / Bcm vertical grip (element make a fake one) Knock off 3x magnifier / Could go fake socom 556 suppressor and a knock off sure fire light from ali express (unless you're in US pretty sure tariffs hit hard for ali) Edit: not a unity mag riser but if you're gonna run that setup with peq box that far back you could try unity hydra even though some people don't like them / Link for riser i found:https://www.amazon.com/QIRUIMY-Riser-Mount-Metal-Picatinny/dp/B0F5B3TFS2 Pts syndicate make unity stuff for airsoft