zrpilot
05-08-12, 18:47
I also posted this in the Technical Section.
Based on everyone's recommendation I bought a Colt AR, specifically the CR6720 (heavy SST barrel) hoping to use the 20" inch barrel for prairie dogs and having another lighter upper for coyotes.
I got the rifle and measured the take down pin and it measures .233 diameter, while the pivot pin measures .247"
Is this all normal? I thought that they both were .250 diameter
Will an another (BCM or DD or etc..) upper fit properly?
Lastly under the take down pin stand-off there is a red rubber bumper, what is this? is this normal? Every schematic I see doesn't have this, what gives?
Thanks
Based on everyone's recommendation I bought a Colt AR, specifically the CR6720 (heavy SST barrel) hoping to use the 20" inch barrel for prairie dogs and having another lighter upper for coyotes.
I got the rifle and measured the take down pin and it measures .233 diameter, while the pivot pin measures .247"
Is this all normal? I thought that they both were .250 diameter
Will an another (BCM or DD or etc..) upper fit properly?
Lastly under the take down pin stand-off there is a red rubber bumper, what is this? is this normal? Every schematic I see doesn't have this, what gives?
Thanks