Hi, I am a new member trying to solve a brass problem. Whether using alexander arms ammunition or using their new brass and loading it I always end up with the same problem. After first or any subsequent firings I always have a sharp crease in the brass. It is always in the same spot, just above the rough halfway mark up the case. I put velcro on the shell deflector but it didn't seem to make a difference. Could this be happening during extraction. I will attach a pic of a once fired brass. Any help would be appreciated. Thank you. John
Dents in brass
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I had the same issue initially. Those dents are most likely from the brass slamming against the back edge of the ejection port. Slow your carrier down by switching to a full auto carrier or a heavier buffer. A FA carrier alone fixed my problem. If get the carrier/ buffer too heavy you could cause short stroking.NRA life, GOA life, SAF, and TSRA
"I ask, Sir, what is the militia? It is the whole people, except for a few public officials. To disarm the people is the best and most effectual way to enslave them."
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Originally posted by pinzgauer View PostFA carrier & H2 buffer in an AA 16" middy still makes the marks.
They do not cause problems, you'll wear the necks or primer pockets out before those dents become a problem.
I also believe it has to be the rear of the ejection port.
I have the m16 bolt carrier and a vltor A5 buffer system (rifle weight); I think I'm way over gassed. I usually find my brass around the 4 o'clock position and up to 10' feet away! with a stock carbine weight buffer, I could feel the buffer bottoming out in the buffer tube.
I'm trying to figure what to do. I guess, I'll have to put an adjustable gas block on it, but I want to keep my A2 sight. JP makes a stainless A2 fsb with adjustbale gas flow, but it's about $120.Last edited by Guest; 12-02-2011, 12:38 PM.
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I put one of these on my Grendel. Added some of the soft part of the velcro to the inside of it at the areas wher brass would strike and have not had any denting issues since. Pretty easy fix for $15.00. And the brass does not kick out more than a foot. They are made for flattops and carry handle style AR's
Also, have one on my match AR in .223.
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Originally posted by coastguardchas View PostThis problem is easily solved, by attaching a self adhering piece of velcro, available at hardware or grocery store, to the shell deflector.
Chas
As mentioned, it's no big deal. Welcome Skunkworks1952. I have a design for embedding an elastomer strike face for brass deflectors that roots all the way to the trail edge of the ejection port, but I don't thin it's a big deal. The cases straighten out in the chamber when you apply 48,000-52,000 psi on them for some reason...
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I use a spikes t2 carbine buffer and my brass comes out perfect and practically falls at my feet.... my bolt carrier is from young manufacturing which i also believe is heavier than standard. Bottom line; the extra weight slows it all down and the brass does not wind up in the next county and comes out unscathed.
Earlier i had tried the jp adjustable gad block but i found that the set screw would not stay and my gas would change. Poor design. I expected more from jp.... so the heavy buffer is the way to go.... bolt carrier too if need be.
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