Ejection issues? > Build It Yourself

Posted: 1/16/2008 7:34:13 PM EDT

On two of my rifles the brass ejects forward. This is a pain at the indoor range because I can't police up my brass for reloading. What would cause this? Otherwise they function 100% including with Wolf ammo.

Posted: 1/16/2008 7:40:20 PM EDT

[#1]

Doesnt say M14 or M1A on the side does it?

Seriously , AR's can vary quite a bit, but will usually throw them rearward. Depends alot upon the extarctor and ejector + springs. Try a buddy's BCG or just bolt if you can and check the difference.

Posted: 1/16/2008 7:48:42 PM EDT

[#2]

Armalite Tech Note 34:

The ejection pattern of a rifle is created by a complex interplay of the opening velocity of the
carrier group, and the extractor, ejector and their springs. In general, the faster the carrier
group opens, or the stronger the extractor and ejector springs, the farther toward 12:00
(looking down on the rifle) the case is ejected. The weaker the springs are, or the slower the
carrier group opens, the farther toward 6:00 the case is ejected.

ArmaLite seeks an ejection pattern between 1:00 and 3:00, and inspects for this characteristic
during inspection. Obviously, the carrier’s opening velocity is subject to differences in
ammunition. Springs can take a set over time, and the ejection pattern eventually shifts toward
5:00. This is normal, and readily adjusted by extractor spring replacement and ejector spring
timing.

The extractor spring and plunger can be changed during routine cleaning. The ejector spring
can be replaced if ejection is too far to the rear, or tuned by shortening it a coil at a time if
ejection is too far to the front. Tuned ejector springs will be between a minimum of .950 and a
maximum of 1.015 inch long.

Posted: 1/16/2008 8:38:03 PM EDT

[#3]

So maybe a stiffer buffer spring? I have lots of buffer springs, I can give that a shot, thanks.

Posted: 1/16/2008 8:54:19 PM EDT

[#4]

The way I read that is that stiffer springs will eject farther towards the rifle's 12:00, meaning farther forward. did I read that wrong?

Posted: 1/16/2008 9:10:20 PM EDT

[#5]

Quoted:
Armalite Tech Note 34:

. . . In general, the faster the carrier group opens, . . . farther toward 12:00
(looking down on the rifle) the case is ejected. The weaker the springs are, or the slower the
carrier group opens, the farther toward 6:00 the case is ejected.

Maybe I'm reading it wrong. But I thought slowing down the carrier group may make it eject further back. This would be easier to try at the range than ejector springs.

Posted: 1/17/2008 2:51:59 AM EDT

[#6]

Have you considered just leaving the parts on the piece alone, and simply buying a brass catching bag for when you're at the indoor range?

That way, when you're outdoors, you won't be slinging your brass into the the guy at the next table

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[ARCHIVED THREAD] - Ejection issues?

[ARCHIVED THREAD] - Ejection issues?