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· Fanatical Feline
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5,275 Posts
Discussion Starter · #1 · (Edited)
Went hikeing today took my M4 and 6 mags of ammo with me. I crossed a river but held my rifle over my head when i swam it but it got me thinking what is it these people are always talking about AR's jamming when they get any mud and sand in them. I wanted to find out myself to scilence some of the AR bashing I always see everywhere.

I tryed this with the new Magpull P-mags, Thermold and a USGI.



sorry for HUGE pictures.












I pulled it out let it drain, checked barrel and fired.. Fired two rounds then I got a FTF with the P-mag. I pulled out the mag and some rounds fell out.



Did this a few times with the Thermold and USGI and they worked fine, then I tryed it with another P-mag and it worked just as good packed with sand.



Other than the one mag failure with the rifle did not jam once from all the sand, I opened it up and it was filled with it everywhere inside in the bolt inside the FCS and in the buffer tube I did one test with the dust cover open for the sand to get inside. I know this is not good for rifles.. Nor is useing the ammo I am ;)

All this without oil from the start and useing the cheapist .223 made Brown Bear

Think its just the one mag that caused this.
 

· Fanatical Feline
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5,275 Posts
Discussion Starter · #4 ·
oh... lol I read something about this in a memo at work but forgot it.

All but one of them are past that date... The one that jamed up is the one with this date.

Il send this one off, thanks man.
 

· Negative Nancy
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1,164 Posts
just as an FYI, the military classifies sand types. So for example if you were to show this explanation to them they would say you have a XX blend of silica, clay, blah blah and therefore isn't pertainent.

i know this cause we had to find the 'formula' for iraqi sand here at work :|
 

· Annihilator
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4,778 Posts
You're a brave mother f'er to actually do the test with your own rifle! Good work Laddy!

Interesting results none the less.

I've been tempted to do that sort of thing with my Glock 21, just to prove to a few people once and for all that its the most reliable semi-auto pistol ever! But, I'm lazy to clean all the crap out of it, and other people have done similar tests, but for some reason the people I know don't believe anything they see on the internet because everything is fake to them. :rolleyes:

Stupid old stubborn men!
 

· Fanatical Feline
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5,275 Posts
Discussion Starter · #13 ·
lol, I like to know what my guns can take.

Another thing that happens when you shoot into this river. Yeah, i know its not safe to do it...



Fish float up! they flap around for a little and then swim away fine. There was a bunch this time and all of them where fine after.
 

· Fanatical Feline
Joined
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5,275 Posts
Discussion Starter · #17 · (Edited)
I forgot I took a video after picking it up out of the river... Not sure how or why but it is hard to shoot and record at the same time.

Yeah I know there are rocks under there, not the smartist thing but its fun.

 
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