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Thread: Running SA & FA BCG in SAME RIFLE is it OK?

  1. #11
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    Quote Originally Posted by Iraqgunz View Post
    You are getting to wrapped around this so let me see if I can clarify.

    1. I always check the headspace even when I purchase a new one. That's me.

    2. There is a 99.9% chance that the headspace is fine. But it will eventually change once you start putting rounds through the weapon.

    3. If the weapon fails headspace down the road at some point then you replace the bolt and recheck.

    4. If it fails again you rebarrel the weapon and recheck with the original bolt. If it passes you are good. If it fails then you replace the bolt. At this point you would have a new barrel and bolt.

    5. I would use the full-auto BCG, keep the 2nd BCG and bolt from the 3rd. I would then sell the 3rd semi-auto BCG. Again, that's me.
    So your suggesting to sell the Semi-auto bcg that came with the rifle and use the Full Auto BCG I purchased from BCM? Also have the second FA as a backup?

    What would be a good head space gauge to purchase? Appreciate your time

  2. #12
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    I would keep all three bolts and sell the S/A bolt carrier. Bushamster sells a 5.56 Field headspace gage for around 30.00. Also, do a net search for Bill Ricca. He had real deal USGI gages a while back. I snapped up 3 of them.

    Quote Originally Posted by Rickenbacker53 View Post
    So your suggesting to sell the Semi-auto bcg that came with the rifle and use the Full Auto BCG I purchased from BCM? Also have the second FA as a backup?

    What would be a good head space gauge to purchase? Appreciate your time



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  3. #13
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    Make sure you buy a USGI headspace gauge (that is what Bill Ricca sells), otherwise you have to take the ejector (round rod in the bolt face, not the extractor) out of the bolt to check your rifle.

    From his website:

    M16 Maximum Headspace Gage, Ordnance Part Number 7799734, NSN 4933-00-070-7814. Disassembly of bolt not needed, gage is cut for extractor and ejector clearance. Each gage is new, in US GI pack. $35.00

  4. #14
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    Quote Originally Posted by jepp2 View Post
    Make sure you buy a USGI headspace gauge (that is what Bill Ricca sells), otherwise you have to take the ejector (round rod in the bolt face, not the extractor) out of the bolt to check your rifle.

    From his website:

    M16 Maximum Headspace Gage, Ordnance Part Number 7799734, NSN 4933-00-070-7814. Disassembly of bolt not needed, gage is cut for extractor and ejector clearance. Each gage is new, in US GI pack. $35.00
    I found his web site. Apparently you have to call or email him to order it? I see Fulton Armory has the same USGI Gage at 49.95

  5. #15
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    You do not need to remove the ejector with the other gages. You only need remove the extractor.

    Quote Originally Posted by jepp2 View Post
    Make sure you buy a USGI headspace gauge (that is what Bill Ricca sells), otherwise you have to take the ejector (round rod in the bolt face, not the extractor) out of the bolt to check your rifle.

    From his website:

    M16 Maximum Headspace Gage, Ordnance Part Number 7799734, NSN 4933-00-070-7814. Disassembly of bolt not needed, gage is cut for extractor and ejector clearance. Each gage is new, in US GI pack. $35.00



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

  6. #16
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    I ordered mine from him over the phone from Baghdad. It was very painless and arrived via priority mail.

    Quote Originally Posted by Rickenbacker53 View Post
    I found his web site. Apparently you have to call or email him to order it? I see Fulton Armory has the same USGI Gage at 49.95



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

  7. #17
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    I hope you don't mind me asking this question on this thread. I have been trying to search for information on this forum about the BCG. I am in the middle of my first build and getting ready to purchase the BCG. I have been finding both Auto and Semi Auto BCG's. I guess the question is does it matter which one you use in a Semi Auto rifle, also is there any legal issues with using a Auto BCG in a Semi Auto Rifle?

    Any Help would be appreciated.
    Last edited by patriot86; 07-27-09 at 17:13.

  8. #18
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    There are no legal issues.
    Low speed, high drag

  9. #19
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    Quote Originally Posted by Iraqgunz View Post
    You are getting to wrapped around this so let me see if I can clarify.

    1. I always check the headspace even when I purchase a new one. That's me.

    2. There is a 99.9% chance that the headspace is fine. But it will eventually change once you start putting rounds through the weapon.

    3. If the weapon fails headspace down the road at some point then you replace the bolt and recheck.

    4. If it fails again you rebarrel the weapon and recheck with the original bolt. If it passes you are good. If it fails then you replace the bolt. At this point you would have a new barrel and bolt.

    5. I would use the full-auto BCG, keep the 2nd BCG and bolt from the 3rd. I would then sell the 3rd semi-auto BCG. Again, that's me.
    Are you stating that I can use a Bolt from a totally different manufacturer in the BCM BCG as a backup? In other words the carrier lasts for ever so to speak and it's just the bolts that break. And bolts are replaceable within any given Carrier regardless of manufacturer? So what I need for backups are generally extra bolts?

  10. #20
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    Quote Originally Posted by Iraqgunz View Post
    You are getting to wrapped around this so let me see if I can clarify.

    1. I always check the headspace even when I purchase a new one. That's me.

    2. There is a 99.9% chance that the headspace is fine. But it will eventually change once you start putting rounds through the weapon.

    3. If the weapon fails headspace down the road at some point then you replace the bolt and recheck.

    4. If it fails again you rebarrel the weapon and recheck with the original bolt. If it passes you are good. If it fails then you replace the bolt. At this point you would have a new barrel and bolt.

    5. I would use the full-auto BCG, keep the 2nd BCG and bolt from the 3rd. I would then sell the 3rd semi-auto BCG. Again, that's me.
    Sorry hit wrong key
    Last edited by Rickenbacker53; 07-28-09 at 09:07.

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