ZCI Rotary Hop-Up Chamber Plastic (M4)

www.ak2m4.co.u...

[@ReportedPerson]

I've got this hopup unit and can't make it working with any nozzle .... 20.80 and 20.40

[@EvanDickersonM81]

Since I can't get gen 1 shs rotary hops anymore looks like I'll be using these

[@xtairsoft]

I actually prefer these to the SHS Blue version, overall better mold. How well it will work depends on the setup etc but definitely worth a try