I would have waited another few more seconds to let the water drain on both models.
And in combat, you'd be dead ....
Why are they so gung ho about shooting guns in water anyways?
Because combat is funny in the sense that you don't get to choose under which circumstances you get to engage, sometimes it's coming off a beach, sometimes you end up lying prone un a deep mud puddle, just the nature of the beast.
The question is how many navy seals have experienced these types of failures with the M4 ?
My guess is plenty, I have several written accounts from SEAL's in Vietnam who had their 16's blow up, which is why they came up with those nifty little "ear plug" style foam thingis that you put at the end of your barrel to keep the crap out, they work, sorta.
I suspect very few. I thought it was standard procedure to hold the bolt open for a few seconds when coming out of the water to let the water run out.
Time is a luxury you rarely have while in combat.
according to the beginning of the video, it was a standard socom test and each weapon was given 2 seconds to drain. i would think that the test is designed to simulate an overt amphibious assault, where an assaulter wouldn't have time to open the bolt and drain out all the water. that's just my impression from the name, over the beach, though
Exactly.
Any retard who would pop out of water that fast would be heard. Who the hell pops out of water anyways and starts shooting, their could be a guy 5 yards behind you in an underground bunker. Navy SEAL's are RETARDS.
Come up slow and drain your M4...on ground. Then you can run away easier.
Nice in theory, just doesn't work that way in combat.
I find the test to be not real life, he was very cautious as to how the rifle was submerged, I doubt that any water got into the barrel.
If the buffer hole was plugged, you would'nt get a KB, the bolt would not cycle correctly thats all.
I fail to see how a piston gun makes any difference vs a DI system, once the bolt is closed the only source of high pressure would be caused by water in the barrel.
I am not an engineer but that's my belief.
The gas tube on a DI is very thin, even a tiny amount of steam (water) in there is enough to dramatically raise the pressures, in this case the M4 performed exactly as it was designed, it blew up when you need it

...
Or, if it's that much of a concern about popping out of the water suddenly and firing they could just use an AK.
The VC did to great effect in Viet Nam.
Yep, they did, which is why SEALs (and various other combat troops) ditched their 16's at the first opportunity and carried captured AK's.
OH I thought the popping out of the water thing was for recruitment photos.
I didn't think they did that.
Yep, they do, how the hell do you thing you do a beach recon ? Or a stealth insertion in coastal environment ? You guessed it, they swim in ...
It is pretty ingenious the way that HK reverse engineered the 1963 American designed AR180's gas system for their rifle, they are so smart.
When Stoner realized how much of a monumental blunder he had made he fixed it, but to this day hardly anyone wants to listen.
i'm not an fluid dynamics engineer, but if you think about it...
the DI M4 requires a significant amount of GAS to be bled back into the receiver where there is limited volume space in an enclosed space. the high pressure gas would need some place to expand and the added pressure of having water in the receiver and the gas expansion would cause some serious pressures in the receiver... i could see how the receiver would blow apart on the M4.
the piston 416 does not expel gas into the receiver, only the rod enters the receiver, and would only cause a negligent increase in pressure compared to the DI M4. the gas in the 416 is bled off at the front of the piston assembly, inside the porous handguard, where there is only open water... not adding pressure to blow up anything.
although not the most controlled experiment, it does do a good job at demonstrating a worst case scenario for both weapon systems.
Yep.
I really doubt HK needs to make things up anyways to make M4 look bad. There is a video of the G36 doing the same thing. The guy practically did not even slow down to drain and the rifle just kept on going. It is no doubt the 416 is more reliable - the question is always that there is not enough benefit to justify the cost.
How much is a soldier's life worth ?