they're like night and day;Is the Cetme bipod different than the HK bipod? Will they interchange?
RTG has the AC wide hand guards, but I suspect they'll be sold out fastRTG parts did have some repro HK bipods but you still need the handguard.
Bipods too - HK BIPODRTG has the AC wide hand guards, but I suspect they'll be sold out fast
G3 Black Wide Handguard New, Vented, Bipod Groove, Heat Sheild, HKG3 triangle forearm, HK91, PTR91, FMP, PTR, Cetme, C308, AC-Unity, ACU-49, RTG Parts (robertrtg.com)