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Posted: 1/26/2009 3:44:23 PM EST
I have both DPMS and Bushmaster bolt catch springs. The pin and spring chart shows that they should have 11 coils and be .517 long and .154 OD

http://www.biggerhammer.net/ar15/pins.html

Mine has 8 coils and is .390 long and .147 OD
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=597432

Do I have the wrong spring or is the chart wrong?

What is mil spec on this spring?

I'd be interested in seeing measurements from several to know for sure.

Thanks
Link Posted: 1/26/2009 4:50:45 PM EST
I don't have the specs in front of me, but make sure you aren't looking at the disconnector spring.
Link Posted: 1/26/2009 5:15:55 PM EST
I just looked at a couple - eight coils and ~.390" long. They seem to work.
Link Posted: 1/26/2009 6:22:36 PM EST
Quoted:
I don't have the specs in front of me, but make sure you aren't looking at the disconnector spring.


Disconnector spring is bigger on one one than the other. Mine are same on both ends.
Link Posted: 1/26/2009 6:23:50 PM EST
Quoted:
I just looked at a couple - eight coils and ~.390" long. They seem to work.


OK apparently the pin/spring chart is incorrect.

Thanks
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