HK 21 Auto bolt carrier
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Thread: HK 21 Auto bolt carrier

  1. #1
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    Default HK 21 Auto bolt carrier

    Hey guys hope not a stupid question. How can I tell the difference between a HK 21 auto bolt carrier and a Semi. I have a 21 but not sure what the bolt carrier is. Thanks Tommy
    Last edited by Tobrooksto; 02-02-2019 at 03:02 PM.

  2. #2
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    look at the bottom, the semi will have a cut where the trip would engage





    on a semi to auto modded carrier you might have a welded in trip lever
    Last edited by TaylorWSO; 02-02-2019 at 04:54 PM.

  3. #3
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    Thanks that is what I thought. The carrier in this gun is weird looking on the bottom. I will take a picture in the morning the material in the other slot is wider at the front and appears to be pushing the lower down so it does not hit the trip. Thanks again!


    on a semi to auto modded carrier you might have a welded in trip lever[/QUOTE]

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