Operator's Guide to the RP-46: https://youtu.be/aKj9FuF5-xQ
You can order your own by contacting SMG Guns at [redacted per YouTube rules]. It's very exciting to have these available, as they are extremely difficult to find originals for sale - and these reproductions can be mounted on standard DP/DPM guns (semiauto or full auto) whereas the original require a couple permanent modifications to the host gun.
Full comparison video with an original RP-46 coming soon, I hope!
http://www.patreon.com/ForgottenWeapons
Cool Forgotten Weapons merch! http://shop.bbtv.com/collections/forgotten-weapons
Contact:
Forgotten Weapons
6281 N Oracle #36270
Tucson, AZ 85704
