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AR-15 Parts help

Discussion in 'Rifles' started by FireInTheWire, Apr 30, 2018.

  1. FireInTheWire

    FireInTheWire si vis pacem, para bellum TGT Supporter

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    This was the first ar I bought. https://core15rifles.com/core15-tac-piston-rifle.html
    I've since replaced the stock with a magpul prs and replaced the trigger with a cmc flat.

    Looking at install this barrel in it

    https://www.groundzeroprecision.com...arrel-1-8-straight-fluted?variant=10287486657

    And this BCG

    https://www.groundzeroprecision.com...15-m16-bolt-carrier-group?variant=41706125716

    I know the BCG is plug and play... but what about the barrel? Can you guys tell me if its just a swap out or is there more to it than that?
     


  2. outdare

    outdare Well-Known TGT Supporter

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  3. grasshopperglock

    grasshopperglock Q

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    The barrel has a big lock nut that holds it in place. You need a vice cover thingy. Plastic rectangle box with a hinge that holds either the upper or lower stationary in a vise without hurting it. Clam shell type thing. It's a must have tool to change barrels.

    Stick the barrel in the upper. There's a notch that aligns it. Screw the barrel nut on. Tighten it, loosen, tighten, loosen. On the third tighten. Twist until the closest hole in the barrel aligns with the hole in the upper. Don't loosen to align, tighten only. That's where the gas pipe go's through the barrel nut and into the upper. Use some anitseize on the upper receiver threads where the barrel nut go's.

    The barrel nut needs to be tighten to at least 30+ foot pounds. Without a torque wrench. You can feel it get snug enough. Especially tightening it till where it the holes line up.

    Install the gas pipe to the gas block. Slide it into the barrel. Check alignment. Tighten the set screw on the gas block. Make sure the bolt key slides on the end on the gas pipe within the upper. If the bolt key sticks on the gas pipe nipple. Tweak the gas tube until the bolt key moves freely.

    Install the forearm and you're good to go.
     
  4. FireInTheWire

    FireInTheWire si vis pacem, para bellum TGT Supporter

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    I appreciate your time on typing this up man. But what your telling me is... take it to my gun guy and let him install it?

    I'm a big diy guy... but I believe i'll pay him to do it and watch.
     
  5. grasshopperglock

    grasshopperglock Q

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    Changing a tire on a car is more difficult and complex. Once you see what's involved. You'll think, 'Well $hit, I could have done that'. You'll only need to watch it one time.
     
    Southpaw likes this.
  6. FireInTheWire

    FireInTheWire si vis pacem, para bellum TGT Supporter

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    OK.. cool. Maybe it's time to dial up some videos on the tube
     
    Southpaw likes this.
  7. FireInTheWire

    FireInTheWire si vis pacem, para bellum TGT Supporter

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  8. outdare

    outdare Well-Known TGT Supporter

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    The hardest part is getting the gas tube to line up. Grasshopperglock has good info in his post.

    Sent from my SM-N920V using Tapatalk
     
  9. grasshopperglock

    grasshopperglock Q

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    I have a stainless AR Stoner brand 300blk barrel leaning against the TV cabinet. Once you get into groove of changing barrels. You have stuff laying around. Had a 5.56 barrel but sold it on here. The 300 was supposed to replace that barrel. Which it did for a little while. But the 300 barrel was replaced by an 8" 5.56 pistol barrel...

    Just wait and see. An AR is a grown man's Lego.
     
  10. Big Green

    Big Green Active Member

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    Many handguards do not use barrel nuts that require the nut to be indexed for the gas tube. Tighten them to spec and you're good to go. Not sure what Core does.
     


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