I am thinking Plastic.

Discussion in 'AR-15 Discussion' started by Shihan, Dec 1, 2010.

  1. Shihan

    Shihan Active Member Lifetime Supporter

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    What would be pros and cons for going with a Polymer lower?:eek:

    Anyone...Just to crazy and not worth it? Or maybe worth a shot and see?
    The price isn't going to be a wallet killer and if it doesn't work out can always get a different one.
     
  2. JonM

    JonM Moderator

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    it might develop wear issues in the reciever pins or in the recoil tube area. but im taking a guess. there is little to no recoil stress on the lower itself. i would prolly stick to 5.56 or pistol calibers with one. im not a believer in polymer frames handgun or rifle. im not sure there are any pros. aluminum mil spec lowers i think might be lighter.
     
    Last edited: Dec 1, 2010

  3. stelliott80

    stelliott80 New Member

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    I recently shot an AR-15 that a friend bought with a Plum Crazy lower, which is composite (first time shooting composite; I own a few ARs, and all have DPMS lowers). The fit is very good between the upper and lower and between the pivot and takedown pins and lower. I read some online reviews from owners after I got home, and most are pretty positive. The cost of the Plum Crazy lower and conventional aluminum lowers is pretty similar. I've seen Plum Crazy lowers for around $100 or a bit more, and (in this case, DPMS) aluminum lowers for $125, just recently.

    I guess I prefer the metal to the composite, but my one firsthand experience tells me that the composite isn't bad, and Plum Crazy claims it can take quite a bit of abuse.
     
  4. dog2000tj

    dog2000tj New Member

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  5. spittinfire

    spittinfire New Member Supporter

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    I personally can't see any issue with a polymer lower other then the threads. I personally wouldn't want one but I can't think of any reason why it wouldn't work. If there are concerns about the take down pins a sleeve could always be made which I guess could also apply to the threads.
     
  6. Dillinger

    Dillinger New Member

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    The lower is little more than a housing to contain the operational parts.

    However it also absorbs and transfers energy from the upper where the round is housed, to the recoil buffer which is attached to the lower by the very threads Spitty is talking about.

    Of the "Polymer" type guns, we have seen about 6 or 8 that have had "explosive disassembly" caused issues resulting in cracks and atleast two outright breaks that I have seen personally.

    My recommendation for a polymer lower would be heavily AGAINST, for what it's worth.

    JD
     
  7. Shihan

    Shihan Active Member Lifetime Supporter

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    I could engrave it with a soldering iron. Making cool designs.:D
     
  8. Quentin

    Quentin New Member

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    I'd stay away from polymer lowers too. The lower is the firearm legally so you want something that will last a lifetime. They're not that much lighter than milspec and definitely not as strong. You see too many pictures of cracked plastic lowers so why chance it. Would you want to mortar one to clear a jam as is done when time is of the essense? Not me.

    To be fair, my friend's Carbon-15 has held up well over two years but I still wouldn't buy one for myself.

    Now in the future there will be better materials and the game can change.
     
  9. mjkeat

    mjkeat New Member

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    Any opinions on the Cav Arms Mark II lower?
     
  10. Shihan

    Shihan Active Member Lifetime Supporter

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    Yes, The Yellow Lower with the a Black upper, GO Steelers.:D
    [​IMG]
     
  11. mjkeat

    mjkeat New Member

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    Im more of a black or FDE guy.
     
  12. Jpyle

    Jpyle New Member

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    You can build one of these with that yellow lower...I hear it's a real tackdriver...:D

    [​IMG]
     
  13. mjkeat

    mjkeat New Member

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    Is that one of those .22 nail guns? You have to get certified to use that thing. OSHA has all sorts of rules for that thing. Itll send fasteners through walls with ease.