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Normal Ejections - Printable Version

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Normal Ejections - blackfoot - 01-15-2012

So my brass gets the case neck flattened on one side, assume ably by it hitting the deflector. Is this normal. You can see the gouges caused by the necks of the cases hitting.


[Image: DSCN6466.jpg]

Normal Ejections - BjornF16 - 01-15-2012

Yep...happens on my AA Entry upper; however on my build (using adjustable gas block) I have tuned the gas port so that this doesn't occur.

Normal Ejections - blackfoot - 01-15-2012

Anything I can do besided put some cushioning of some sort on it?

Normal Ejections - BjornF16 - 01-15-2012

I think there was a previous thread that discussed similar question...you may want to search the forum. I recall someone mentioning moleskin...not sure if swapping to heavier buffer/spring would spoil cycling.

Normal Ejections - Deezil - 01-15-2012

I want to put an adjustable gas block on mine when I get it back, any suggestions?

Normal Ejections - Variable - 01-16-2012

blackfoot Wrote:So my brass gets the case neck flattened on one side, assume ably by it hitting the deflector. Is this normal. You can see the gouges caused by the necks of the cases hitting.


[Image: DSCN6466.jpg]
Perfectly normal. The easy and permanent solution is to take the adhesive backed fuzzy half of a velcro strip and stick it on your degreased brass deflector.

You can try tuning it with an adjustable gas block, but the velcro fix is a whole lot less involved and will never have a screw back out or require retuning for a different load. Smile

Normal Ejections - JohnOD - 01-16-2012

You can trim the length of the ejector spring and the brass wont hit the deflector so hard. Some guys balk that you may lose some reliability but I have excellent results doing it on several uppers. Besides the brass not getting overly beat up another plus is once tuned properly your brass will land in a nice pile just a few feet away. I will try & post a link once I find it.

Here's the link...

http://www.gswagner.com/arejector/arejector.html

Instead of trimming the spring so the ejector is flush to the face of the bolt (without the roll pin installed) I like to leave it ~1/16" longer. You might want to have a couple of extra springs on hand.

I'm pretty sure that here I'm supposed to say something like this... If you are depending on your AR for defense of life & limb I would leave it alone if it functions properly.

Normal Ejections - Mutt - 01-16-2012

There's nothing to fix. It's absolutely normal. The velcro fix is the best thing going. You could buy an adjustable gas block. But, you would be spending more money to fix something that is working properly. The velcro will also stop the damage to the case necks as well as stoping the gouging.

Normal Ejections - stokesrj - 01-16-2012

JohnOD Wrote:You can trim the length of the ejector spring and the brass wont hit the deflector so hard. Some guys balk that you may lose some reliability but I have excellent results doing it on several uppers. Besides the brass not getting overly beat up another plus is once tuned properly your brass will land in a nice pile just a few feet away. I will try & post a link once I find it.

Here's the link...

http://www.gswagner.com/arejector/arejector.html

Instead of trimming the spring so the ejector is flush to the face of the bolt (without the roll pin installed) I like to leave it ~1/16" longer. You might want to have a couple of extra springs on hand.

I'm pretty sure that here I'm supposed to say something like this... If you are depending on your AR for defense of life & limb I would leave it alone if it functions properly.

This is what I do too. Some think it reduces reliability, but I haven't found that to be true. I shoot a service rifle in the national matches and attaching the velcro disqualifies the rifle as a service rifle. So I trim the spring. One of my uppers has over 14,000 rounds and third barrel, with this modification and has had zero failures to eject or to feed. And as already stated, when I finish a stage my brass is in a nice pile at 2:00. We call it potty training.
Bob

Normal Ejections - Costa - 01-16-2012

I have two of these.

http://www.joeboboutfitters.com/Kies_Adjustable_Gas_Block_Low_Profile_p/kies-adj%20gas%20blockgen2.htm

Normal Ejections - sneaky one - 01-16-2012

I was going to install an adj. block on my Entry bbl., but have not found one with an inside diam. of .905. I suppose I could hone the inside of a .750 to fit. Bjorn, what did you have to do?

Normal Ejections - StoneTower - 01-16-2012

http://www.midwayusa.com/product/992168/pri-low-profile-adjustable-gas-block-with-straight-rifle-length-gas-tube-ar-15-standard-barrel-875-inside-diameter-steel-matte

They also have a .750 & a .936 diameter.

If I had to hog one out to .905, I would start with the .875.

Normal Ejections - BjornF16 - 01-29-2012

Sneaky, I didn't install adjustable on my AA Entry (with .905 diameter). I have a second Grendel with Satern Spartan with .75 gas block (this is the one with adjustable gas block).