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MickB

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About MickB

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    Phoenix, AZ
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    Mick Bjelopavlic

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  1. Don’t eyeball your gas block installation. Mic the distance from the barrel shoulder to the start of the gas port. Now mic the distance from the back of the gas block to the start of the gas hole. You will more than likely have a 0.02-0.03” difference. Use a feeler guague up against the barrel shoulder to ensure correct offset. Another trick is to cut the end of a toothpick and drop it into the gas block hole (make sure your gas metering screw is all the way out). Position the barrel with the gas port facing down then slip the gas block on upside down. Turn the assembly right side up and look down the bore. Wiggle the gas block around. When the holes are aligned the toothpick will drop from the gas block into the barrel. Tighten gas block. The toothpick piece should fall out of the barrel, if not use a rod to push it out. All done and gas block will be perfectly aligned. Mick
  2. MickB

    Stretch 15

    How are the gas port sizes on these? Adjustable gas block needed? Mick
  3. The sweat off Kurt Miller’s brow! ? Mick
  4. Shield SIS... https://www.brownells.com/optics-mounting/electronic-sights/red-dot-sights/sis-center-dot-red-dot-sight-prod82465.aspx Regards, Mick
  5. Low Pro hand stop is the smallest I have seen and are perfect for short barrel applications https://www.lowprollc.com/product/
  6. I load to 1.15" and have no issues... Mick
  7. Just use Independence 5.56... Mick
  8. Contact QC10 and see if they will help by swapping the set. The QC10 lowers I have are all tight with their uppers. Mick
  9. I load to 1.15" with 124gr Precision Delta fmj with no issues in a Ballistic Advantage barrel. Mick
  10. You do know there is a tension screw in the QC10 lower to tighten the upper to lower fit, right? Also, as in any upper/lower set, fit can also be influenced by the front pivot pin. Mick
  11. Superstition Mountain Mystery 3 Gun 2018 at Rio Salado Sportsman's Club, Mesa AZ March 23-25, 2018
  12. The QC10 lowers have a tension screw built in to take out any slop from the upper. With that said, my QC10 upper fit my QC10 lower so well that I had no need to use the tension screw. Mick
  13. Can you show the internals? Are the pistons available from commercial sources? Mick
  14. That is pretty sad if true. The Colt 9mm AR was designed around a regular mil-spec upper, so if an upper receiver maker can't get something as basic as the bolt bore correct then they have quality issues. Mick
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