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Thread: Mag or mag block issue?

  1. #1
    Join Date
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    Mag or mag block issue?

    Hi all
    Just installed a Hahn block on an SBR and topped it with a PSA 7.5" upper. Using 2 different ASC mags, 115 and 124gr ball worked fine, but 147 HST wouldn't feed. The bolt hold open was also inconsistent.

    Using a PSA glock lower, the upper fed all the above, including the 147s.

    I've read good things about Hahn blocks, so I'm wondering if this is most likely a magazine, block or ammo?

    Any thoughts?
    Last edited by Caduceus; 01-22-17 at 12:09.

  2. #2
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    Deleted
    Last edited by bfoosh006; 08-29-17 at 19:37.

  3. #3
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    Will try. I just got 2 metalform in yesterday. I also read somewhere recently that Colt styles hiccup more with HP rounds.

  4. #4
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    FWIW when I put my first 9mm Colt pattern AR I used a Hahn toploader block & Metalform mags cause that seemed to be the overwhelmingly most popular trouble free setup.
    No issues in 4 years of use, mainly FMJ round nose and some truncated (flat nose) bullets.

    I've never owned any ASC mags, but in another thread someone claimed the Metalforms feed flat/horizontally and like to sit high while the ASCs feed at a slightly more upwards angle and like to sit low. So a bottom loading mag block can be adjusted to work with both but Hahn top loaders prefer the Metalforms.

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