On pre-order right now from Barwarus is their Zenit-Style Alpha 1 Handguard Kit For AKs. Check below the compatibility... "This is the Z-Style Handguards set for the AK-family, designed and made for AK rifles. Consists of 2 parts in a kit. Pricing goes as well for the kit of 2 parts together (+ screws).
Airsoft Atlanta had a restock of the Action Army AAP-01 GBB pistols and accessories and one of them is the Action Army AAP-01 Airsoft Handguard Kit... "The Action Army AAP-01 Handguard Kit is a full completed kit to allow any AAP-01 feature a handguard. Made out of aluminum, the Action Army AAP-01 Handguard features 2 QD points alongside its M-Lok compatible slots."
Now available at Evike.com is the Angel Custom Disruptor 14" M-LOK Handguard for Umarex TAR-21 Series Airsoft AEGs. CNC machined the M-Lok system allows for the mounting of weapons accessories and can be fitted to both standard and CQB versions. This includes the Disruptor-style flashhider block with barrel extensions for both lengths and space for battery packs.