Re: suppressor cover
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Tburkes</div><div class="ubbcode-body">I just saw this so I'll reply here so everyone can have the same information.
The inner material is rated for 1800 degrees working temperature. What happens though with the 5.56 rapid rates of fire is that the heat builds up so fast inside that the heat migrates through the inner material faster than it can dissipate to the atmosphere and will melt the outer Cordura covering.
If you're running 5.56 ammo in a rapid semi auto fire with no cooling in between mags you'll have your cover melting on the third mag, possibly after the second mag if you run it hard enough and then just sit the weapon down without removing the cover to let it cool down as the can temperature peaks before it begins to cool down.
I know of guys who run mags through their rifles and let the can cool down a bit in between mags and have not had any problem.
I know of two instances of .308 rifles that have melted a cover. One was on an SR25 and the shooter was someone who was told to go out and "test out the cover" He reported back that he melted the cover in 75 rounds. There was nothing scientific about this test at all so no one knows what the rate of fire was, but the guy in charge of the shooter wasn't impressed with what the guy did.
The second failure of a .308 rifle was under controlled conditions. The rate of fire was a round every two seconds until the cover failed which was 75 rounds.
These are the only two instances that I know of that a cover has failed until now I read of KYS338 having a problem with an AR10. I'd be interested in hearing what was going on when that happened.
The 5.56 is the hottest round that I know of, what with high rates of fire, shorter barrels, hotter round, and that's why we have the melting issues with the current construction. The covers as they're currently manufactured are to combat mirage, not as a heat shield. These two differences are a major thing. You've got to be careful not to use some kind of radiant barrier to hold the heat in because as you know heat is a by product of suppressed fire and if you don't let it go out somewhere your can will suffer damage.
I've talked to some people who have a lot more can experience than I'll ever have and they agree that a .45ACP should not generate enough heat to damage one of these covers.
Any more questions? </div></div>
Yes, I was thinking of using ( sometime) my 45acp carbine (hk usc) in 3 gun matches (if they allow pistol caliber rifles) and after watching the magpul videos i can see where a cover would come in handy to keep me from getting burned when i went to secondary weapon, my carbine is semi auto but in the magpul videos those guys are really going threw ammo, I would hate to get a cover and spend the 60 something dollars only for it to fail on me and embarrass. Out side of that I really dont ever shoot so unless i take shooting classes i know the cover wont fail but at the same time i dont think i would need it if i dont take the classes so.
