Systema PTW service

Disassembly and small service on a Systema PTW. This has seen a few years of use and is just having a bit of a clean up.

Background music:

NIVIRO - The Ghost [NCS Release]
Music provided by NoCopyrightSounds
Free Download/Stream: http://ncs.io/TheGhost
Watch: http://youtu.be/lTEzfj8IAR0

Jnathyn - Dioma [NCS Release]
Music provided by NoCopyrightSounds
Free Download/Stream: http://NCS.io/Dioma
Watch: http://youtu.be/r2Ig85ycGKQ