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Thread: M16A4-like recommendations?

  1. #51
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    Say, I have a lower here that's going to be a rifle soon.

    The ONLY thing holding me back at the moment is the factory staking on an M&P lower. It's very small and looks like it's hard to reach.

    I think I need to break this factory staking, but I'm not getting enough leverage with my spanner wrench which is only 7" or so...

    How should I proceed to remove that receiver extension?

  2. #52
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    I was gonna say why go through all that non-sense with colt or wait for a FN which may or may not ever happen. I'd just get the BCM 20" upper and get the KAC rail and call it a day.

  3. #53
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    Quote Originally Posted by rojocorsa View Post
    Say, I have a lower here that's going to be a rifle soon.

    The ONLY thing holding me back at the moment is the factory staking on an M&P lower. It's very small and looks like it's hard to reach.

    I think I need to break this factory staking, but I'm not getting enough leverage with my spanner wrench which is only 7" or so...

    How should I proceed to remove that receiver extension?
    Sacrifice the receiver plate. It is a $6 part. If it is too aggressively staked then you can, being careful, drill out the staked material with a small drill bit. You do not have to totally remove the staking. Just remove enough so that the castle nut can be turned off. You do one want to mess up the (more expensive) receiver extension.

  4. #54
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    Quote Originally Posted by LonghunterCO View Post
    Sacrifice the receiver plate. It is a $6 part. If it is too aggressively staked then you can, being careful, drill out the staked material with a small drill bit. You do not have to totally remove the staking. Just remove enough so that the castle nut can be turned off. You do one want to mess up the (more expensive) receiver extension.

    Sounds like a plan.

    However, how should I do that precisely do that I don't **** anything vital up?


    Is the goal here to remove the little material from the notches on the castle nut?

  5. #55
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    I have only had one that was staked so much as to require removing it (and that was only on one of two stakings on that rifle). I chucked a 1/16" drill bit in the drill and drilled into the material that was upset into the castle nut (so in this case I was drilling into it at an angle) I just drilled into it until half or more of it was gone and then put my wrench on it an twisted it off. There is only a little bit of metal that is displaced in there so there is no need to hog out a bunch of material. I was using a good stock wrench (not one of the cheapy stamped ones) and it spun right off with a little force.
    Take your time go slow and remove a little, put the drill down, see if you get any movement, if not remove a little more and then do it until it turns off. You should not have any problems.

  6. #56
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    Thanks.


    I'll have to make do with an el-cheapo stock wrench that I have lying around. At least it has the slot for the A2 receiver extension, which will be handy right after.

  7. #57
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    I don't know if this has been said yet since I haven't read the whole thread but Colt is coming out with AR in the M16A4 version next year.

  8. #58
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    Well, I did it! My buddy is gonna be happy.

    Yes, the endplate and castle nut were sacrificed, but big deal. We probably spend more on shit like coffee on a daily basis or something like that.



  9. #59
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    Quote Originally Posted by rojocorsa View Post
    Well, I did it! My buddy is gonna be happy.

    Yes, the endplate and castle nut were sacrificed, but big deal. We probably spend more on shit like coffee on a daily basis or something like that.


    Excellent. If you like the handguards on your carbine you will like them on that rifle too.

  10. #60
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    Congrates! Now go and shoot it.
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