I modded an RPK and i forgot how I even did it too. I know i swapped it out with some sort of smg and it came out like the picture below. I also made the rest of the gp mg's into an smg. It is a fairly handy mod. Also check out the mk.48 after you have injected everything. It has a cool skin if i remember right. Also the m60 is a minigun.
WTF RPK mod. It is totally messed up. It has a higher rate of fire and a quicker reload animation. It is more for looks but it still works better than the actual RPK.
(this may have the stats of mp7, mac10, or scorpion)
Virustotal. MD5: e459a8eb3b7b8aa0f47e19751ce489d7
[IMG]https://i963.photobucke*****m/albums/ae117/cookiehack/Combat%20Arms%20Mods/Combat-Arms_01.jpg[/IMG]
If you like it thank me by pressing that little "thanks" button.