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Thread: Can a lower be broken by using a hammer/punch to field strip?

  1. #11
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    Quote Originally Posted by manbearpig View Post
    Thanks a lot for the responses.

    Just for my own learning, provided that the hammer isn't making direct contact with the lower, how is it that hammering a takedown pin with a punch can break the lower? It seems counterintuitive to me, though I lack sense and experience when it comes to anything mechanical.
    In my expeience with ARs, if the lower takedown pins are hard to push out, then something else is wrong, usually something as simple as the upper and lower not being porperly aligned with each other.

    As far as the hammer or the punch not making contact with the lower, if the pins truly are stuck, the punch can bounce after being hammered as an example.

  2. #12
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    Of course I am not living somewhere with an on going two way firing range, so at my safe home or safe home shooting range I use lots of lubricant and a nylon hammer and high rep count with a gentle continuous tapping. I have even amazed myself<(very hard to do BTW ;-) )with what I have made easier to manipulate or much better at locking or unlocking.
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  3. #13
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    Quote Originally Posted by ColtSeavers View Post
    In my expeience with ARs, if the lower takedown pins are hard to push out, then something else is wrong, usually something as simple as the upper and lower not being porperly aligned with each other.

    As far as the hammer or the punch not making contact with the lower, if the pins truly are stuck, the punch can bounce after being hammered as an example.

    Haven't seen a forged upper/lower that was this tight, but did have an old cast lower that was so screwed up that the pins ended up being that tight. Have to wonder if breaking during disassembly isn't just the straw that breaks the camels back from being way too tight in the first place.

  4. #14
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    Quote Originally Posted by ColtSeavers View Post
    ...pins truly are stuck, the punch can bounce after being hammered as an example.
    I use a plastic dummy round for a punch, that way if it slips off, it won't damage the finish. It won't punch it all the way through, but probably enough to loosen a tight pin. I use the dummy round to start removing hammer pins too, and then a normal punch to finish driving it through

  5. #15
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    If we are removing the trigger, have we went a bit further than field stripping?
    If it isn't broken, why remove it? Cleaning can be more than adequately done with the trigger still in the lower.

    All that being said, anything that involves a hammer involves the risk of breaking something.

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