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1/25/2018 7:38:29 AM
Posted: 8/1/2003 3:08:21 AM EST
Since I have owned it (about 9 months, and with all original parts), my DPMS Classic 20" A2 HBAR has thrown brass about 10 feet to about 4 o'clock. It makes no difference if I use Fed Am Eagle .223 or UMC .223 or Fed 5.56 XM-193.

In contrast, my son's Oly A2 20" HBAR throws brass more like a well-timed & well-lubed M-1 Garand ... about 3 feet to 2 o'clock.

Is there a "normal" ejection characteristic for an AR-15? If so, what is it, and if it's not what mine or his is doing, what might be the cause?
Link Posted: 8/1/2003 1:30:57 PM EST
[Last Edit: 8/1/2003 1:32:39 PM EST by Paul]
Each barrel length and ammo has a different velocity and ejection pattern. To answer your question I don't know. I have been shooting AR's for over 20 years, have 8 or more of them but never watched where the brass goes - as long as it goes out of the chamber making room for the next round it's good for me. I pay more attention to where the lead goes than the brass.
Link Posted: 8/1/2003 11:07:45 PM EST
[Last Edit: 8/1/2003 11:08:57 PM EST by b0ne]
Around 4:00 is normal, IIRC (for normal rifles, 16-20"). The further forward it lauches brass, the more worn out the extractor and/or ejector springs are. I can't remember, though, but it's something along those lines. Perhaps someone else will nail it down.
Link Posted: 8/3/2003 8:31:25 AM EST
Go to [url]www.armalite.com[/url] and on the left, click the Tech Notes. Read Tech Note 34. Though it is mostly about the AR-10 it states "These ejection patterns are common to all AR-15/M16 pattern rifles." This should give some inside into your observations.
Link Posted: 8/3/2003 11:19:46 AM EST
Thanks, A_Free_Man, great info, just what I need to know.
Link Posted: 8/8/2003 9:30:19 AM EST
I see this a lot on the range. On the range I instruct at the same M16s are used day after day for training. When we see rounds being ejected between the 1 and 2 o'clock position, we take a close look at the extractor and ejector springs. Many times we end up replacing them. What you are describing sounds perfect. The more you shoot your AR, the more you should see the rounds flying forward instead of back.
Link Posted: 8/8/2003 9:50:57 AM EST
My ejected brass always seem to gravitate towards Grant.
Link Posted: 8/8/2003 4:32:38 PM EST
Interesting...I just shot my brand new AR-15 the other day and noticed the brass laying in a nice pile at about 2 o'clock. 16 inch M4gery never missed a beat.
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