I'm in the middle of an AR-15 build, and as I've been researching parts, I've continually come across images / videos of various people gripping an AR-15 with a "c-clamp" grip with their support hand (see image below). Is this a recent development? I've grown up around guns my whole life, have shot the M16/M4 for three years, and have received PMI's from MSG's and have never come in contact with with this style of grip.
I'm not offering an opinion on this grip, just trying to understand is uses and advantages. I've never been deployed, is this something some people/units commonly use in combat? Maybe only in special circumstances? Maybe it's a grip mostly used in 3-Gun or other speed-shooting competitions?
The first grip I ever used (when I was really young) was the underhand "clamp" - what I would use to support my hunting rifle. As I advanced to assault rifles, I switched to using a vertical fore-grip or a "magwell" grip. I've never tried the c-clamp grip (haven't been to the range since I've discovered it), but I'm definitely going to give it a go and see what I think.
I will freely admit my ignorance on this subject. While I shoot expert on the Army qualification course, I am not an expert - I have learned the basics.
Any insight would be greatly appreciated. I'm mostly interested in military application and SOP, although if your knowledge applies to competition shooting, I'd be happy to hear that too .
Thanks in advance!
Chris Costa using the "c-clamp" grip with his support hand