Doppelglock i.e. Double Glock
http://www.thefirearmblog.com/blog/2...-auto-pistols/
There has been some comment that the man in the images looks like
G. Gordon Liddy but is most likely to be László Tolvaj and as one person has commented at the above site, Tolvaj is an editor of the small arms, German language, Waffen magazine.