I wouldn’t get the panties in a wad too much guys, about this.
It’s clearly not my HK is better than your M4, it’s just an illustration that DI is bad juju if submerged or partially submerged. Barrel length doesn’t matter, and who cares what angle the gun is at or whether one was allowed to drain for one second longer? Point is that the water can’t clear out of a DI and that if you get a gun that wet, it’s probably going tits up, if it doesn’t hurt you. SEALs swim with their guns; most other folks don’t.
That said, we’re not going to put our guns into those conditions, but it is kinda cool to see what happens. I have to admit, HK does the mud, sand and dust tests for demos and they close the ejection port, etc. But when Robert Hirt is involved, they are seriously finding out what’s what with stuff.
I am told this test was repeated at least “two dozen” times, and that the 416 never failed once. It has special drain holes in the base of the bolt carrier and rear of the lower receiver to allow water to escape for 100 percent function.
I can’t for the life of me figure out why HK isn’t pushing this stuff harder. They have all kinds of torture testing video out there, tons from their Yuma days.
In fairness, and I don’t know that it matters, this may have been a Diemaco C8, as the Germans didn’t have any Colt’s in Oberndorf during the time these tests were conducted.
Now, if I could only get my hands on the G36 video where Robert fires nine full Beta mags continuously, and the forend catches fire at round 800, but the gun fully functions through to the end.
Robert (albeit without eye protection) shields his face with his arm from the heat.
Similar test on M4 (or C8) and 30 round magazines launches bullet out of the side of the barrel at about round 570.
That Oberndorf barrel steel. Tuff stuff. 