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Posted: 1/29/2011 5:06:09 PM EDT
I've noticed that my newest rifle (BCM LWT 16" upper assembly, Spikes Chrome BCG & Buffer) seems to eject the brass a little more violently than my other rifle (Stealth 16", Larue BCG & 9mm buffer). it dents the case a little vs. not denting the brass at all. It's not really a problem, and could be the design of the brass deflector or the ejector spring.

anyway, I started wondering how close the weight of the buffers I have are to what they are supposed to weigh.

Here's the info.

the first CAR buffer is from AIM and the weights don't move. the 2nd is from a tapco commercial stock kit and the weights do move.
Link Posted: 1/29/2011 5:40:59 PM EDT
What gas length is your BCM?
Link Posted: 1/29/2011 5:47:23 PM EDT


What gas length is your BCM?

both rifles are mid length.

Link Posted: 1/31/2011 6:38:40 AM EDT
both rifles are mid length.

After seeing Andrew's (87GN) videos of bolt bounce, I've gone away from using 9mm buffers in my carbines.  I have started using the ST-T2 buffer and in one with a carbine gas tube, the H2 buffer.

What is the ejection pattern for your two carbines?
Link Posted: 1/31/2011 9:56:38 AM EDT
the stealth ejects between 4-5 o'clock.

not sure about the bcm. it's only been to the indoor range and the brass just bounce off the stall wall.

I've seen the videos. I don't know if the 9mm buffer bounces in my rifle or not. I doubt my buffer spring and/or gas system is identical.
Link Posted: 1/31/2011 10:46:50 AM EDT
Before I put the H2 buffer in my wife's M4gery, it would eject at around 2 o'clock or so.  Now, it ejects around 3:00 to 3:30.

A 4 to 5 o'clock ejection pattern might be because of your 9mm buffer.  Ejection of an A2/A4/M4 upper should be around 3 to 4 o'clock.

Still, if it works and you like it.....
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