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Thread: My sons new 300 AAC Blackout

  1. #11
    gunco irregular moleman's Avatar
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    VZ, I love the look of the handguard! How did you index it as you cut it?

  2. #12
    tired of idiots vz58's Avatar
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    I made a fourth axis on the cnc i built. It was easy. Position tool .500" in drop to .055" cut slave a axis to x axis, specify 180 degrees negative over a 7" x axis run. Do itdo it 19? Times evenly spaced.

  3. #13
    tired of idiots vz58's Avatar
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    SStuff like that is stupid simple now. If your looking for something along those lines pm me.

  4. #14
    gunco irregular moleman's Avatar
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    And here I thought you did it with your dividing head and the green machine. Building your own cnc is even better! I do have a couple builds that I'm slowly working on that I haven't got handguards yet.

  5. #15
    tired of idiots vz58's Avatar
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    Lol the dividing head had a cogged belt gear machined for it, a stepper motor, bracket and belt added and it became the fourth axis on that is green machine that i put 3 axis on. Its hard to believe but i go to the "real" machine shop in town now and cuss about counting turns of the dials and where to account for backlash etc.

    I can cut zigzags on the tube,spirals multipitch spirals etc.

  6. #16
    tired of idiots vz58's Avatar
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    My handguard on the 450 bushmaster with a low pro upper

  7. #17
    tired of idiots vz58's Avatar
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    First test fire was today! The gas port isnt drilled but that and little rounding of the chamber mouth is all that is left on th upper. Fired case was perfect but the sharp chamber mouth scratches or hangs up manual feeding from the mag. No biggie as i didnt want to do it before assembly and testing. My wife and i were surprised at th sound level of the round and the ABSOLUTE lack of flash and powder burn on the test board it was strapped to. Pretty quite to for an ak powered round.

  8. #18
    GuncoHolic 2ndAmendican's Avatar
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    VZ, I'm not well versed on the AR's, so I apologize for my ignorance, but how do those handguards on your 450 and your son's 300 blackout attach to the upper? They look great.
    Last edited by 2ndAmendican; 10-01-2011 at 07:51 AM. Reason: spelling
    Enforcement, NOT Amnesty!!!!!!

    "If they’re going to come here illegally, apply for & receive assistance through a corrupted Government agency encouraging this lawless behavior, work under the table & send billions of dollars each year back to their families in Mexico, while bleeding local economies dry, protest in our streets waving their Mexican flags DEMANDING rights, while I have to press ’1′ for English, then they need to be shipped back to where they came from!" -Chad Miller

  9. #19
    GuncoHolic BigAl's Avatar
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    Instead of a delta style ring you will have a external threaded barrel nut. the hand guards just screw on the barrel nut.

  10. #20
    GuncoHolic 2ndAmendican's Avatar
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    Oh, ok. I get it now. Thanks BigAl.
    Enforcement, NOT Amnesty!!!!!!

    "If they’re going to come here illegally, apply for & receive assistance through a corrupted Government agency encouraging this lawless behavior, work under the table & send billions of dollars each year back to their families in Mexico, while bleeding local economies dry, protest in our streets waving their Mexican flags DEMANDING rights, while I have to press ’1′ for English, then they need to be shipped back to where they came from!" -Chad Miller

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