RA-Tech test the recoil power of GHK AKM gas & co2 mags

RA-Tech have a new test video:

RA-TECH made a test video. RA-TECH A scientific experiment of GHK AKM gas and co2 mags recoil power test

[youtube http://www.youtube.com/watch?v=LL01ALiR9Jc&hl=en&hd=1]

(RA-Tech)