Cyma AK47 Service and upgrade

Making this Cyma AK47 Spetsnaz perform that little bit better than out of the box. Upgrading the piston, spring guide, hop and barrel. Also shimming the gearbox to increase the durability and performs for skirmish use.

Background Music:
Track: DJ ASSASS1N - Frag Out [NCS Release]
Music provided by NoCopyrightSounds #2
Watch: https://www.youtube.com/watch?v=-iK-unzUycw
Free Download @ http://bit.ly/dj-assass1n-frag-out