MPi81 
The MPi-69/81 has a more conventional charging handle, but otherwise varies very little from the MPi-69.
AboutThe MPi-69/81 has a more conventional charging handle, but otherwise varies very little from the MPi69.
A silencer conversion was made which required swapping the barrel and replacing the barrel retaining nut with a proprietary suppressor that performs the dual role of securing the barrel.
References
Bishop, Chris (1996). The Vital Guide to Combat Guns and Infantry Weapons: Personal and Support Weapons of the Modern Infantryman (Reprinted 1999). Airlife Publishing & Aerospace Publishing, P.27. | ISBN 1853105392 | Amazon
