Sun May 06, 2018 4:58 pm
Sun May 06, 2018 5:03 pm
Sun May 06, 2018 5:29 pm
Sun May 06, 2018 5:30 pm
Sun May 06, 2018 5:35 pm
Sun May 06, 2018 5:44 pm
Sun May 06, 2018 6:07 pm
sinus211 wrote:Give me the brake tomorrow. I'll take it home and run it in the ultrasonic cleaner overnight. Should remove the build up.
Yondering wrote:I don't think that small amount of crud buildup has anything to do with the accuracy of that system; I've seen much worse on rifles that shoot very well. Naturally fouling like that will build up in any gap like that between a muzzle and brake or flash hider; a common A2 birdcage is one example, but it will take many thousands of rounds (if ever) for the fouling to build up to the point of hurting accuracy.
One possibility for your accuracy problem though might be the jam nut. You should always install a brake against the barrel shoulder or the muzzle, not against a nut like that. The nut can allow the brake to be inconcentric with the bore, and that can definitely affect accuracy.
If that were mine, I'd clean the brake threads out with a 5/8"-24 tap, but without that you'll have to use a pick of some sort to reach in there and scrape it out of the threads. You could try soaking it in something like Kroil or Hoppes #9 for a few days, but I doubt you'll find anything to actually dissolve that stuff.
The muzzle needs a cleaning but looks fine otherwise; I'd try some OO steel wool under your thumb, just rotated against the muzzle.
MadPick wrote:Meh. That looks fine to me.
I would try shooting it without the brake, though, to see if accuracy is better. If it is, then you have a starting point.
jukk0u wrote:It's the palsy you old fracker!
Sun May 06, 2018 6:21 pm
Sun May 06, 2018 7:34 pm
Sun May 06, 2018 9:08 pm
Normanator wrote:I'm certainly no expert, and others here are more versed than me on ARs, but that metal build up looks copper colored, almost like pieces of jacket have been hitting it. Now that could just be copper fouling from the muzzle I suppose.
What's the purpose of not seating the brake fully? Seems they were designed to be used threaded all the way on, but I'm not familiar with that particular model, so maybe not?
Sun May 06, 2018 9:11 pm
Mon May 07, 2018 5:02 am
Mon May 07, 2018 6:57 am
Yondering wrote:One possibility for your accuracy problem though might be the jam nut. You should always install a brake against the barrel shoulder or the muzzle, not against a nut like that. The nut can allow the brake to be inconcentric with the bore, and that can definitely affect accuracy.
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Mon May 07, 2018 1:14 pm
RocketScott wrote:Yondering wrote:One possibility for your accuracy problem though might be the jam nut. You should always install a brake against the barrel shoulder or the muzzle, not against a nut like that. The nut can allow the brake to be inconcentric with the bore, and that can definitely affect accuracy.
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That right there. Get a set of shims and install the FH correctly.
BadKarma wrote:Have you consider it might be the operator head space and timing? Drink water, change your socks.
Mon May 07, 2018 1:21 pm
jukk0u wrote:It's the palsy you old fracker!