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1/25/2018 7:38:29 AM
Posted: 2/23/2006 8:45:48 AM EST
Can anyone explain the XCR's operating system?
How does it compare to the SIG 556? or Colt gas piston upper?
I am familiar with the AR-15 system and acquainted with a gas piston system.
Please educate me.
Link Posted: 2/23/2006 1:16:59 PM EST
Is there any info in their brochure?

www.robarm.com/XCR%20Brochure%209Feb06.pdf

I've never read it, so I cannot tell you if there's info on the gas system or not.
Link Posted: 2/23/2006 1:30:37 PM EST
long stroke piston system, similar to an AK
Link Posted: 2/23/2006 2:06:39 PM EST
exactly what Trey said :)
Link Posted: 2/25/2006 4:05:06 AM EST
Can anyone go into a little more technical detail?
Comparison to XCR?
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