GUN multi-cal vs single cal lowers

Discussion in 'On Topic' started by you know me, Aug 30, 2009.

  1. you know me

    you know me OT where the douchbags play

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    I'm starting to research building a ar lower but I don't want to just rush in and start buying parts. I was looking at an areo precision multi cal lower but I didn't know if it was worth it to get the multi-cal lower or stick with the 5.56 lower. I doubt I'll ever end up swapping uppers out but it's always nice to have that option. What does WMD think?
     
  2. Soybomb

    Soybomb New Member

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    You have that option anyway, the caliber marking on the lower is meaningless.

    buy cheap, or better yet buy cheap and put the money you save into buying another lower so next time you wont have to pay another ffl fee
     
  3. GearHead

    GearHead Active Member

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    .

    Listen to soybomb, he is wise.
     
  4. The Cable Guy

    The Cable Guy New Member

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    Well, I guess I don't need to say shit on this matter.
     
  5. xpinchx

    xpinchx hes got a nice cock, on the thin side but its stil

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    I had an AP lower but only because it was the cheapest at the time. Worked fine, just like every other lower.
     
  6. you know me

    you know me OT where the douchbags play

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    thanks for the info and not bashing me because I'm new to this :wavey: you resore my faith in ot
     
  7. GearHead

    GearHead Active Member

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    We all gotta start somewhere man. I feel that, with firearms especially, there is almost TOO much information and crazy acronyms that confuse the hell out of people at the start. I have actually considered making a blog that has a central collection of info without any of the retardedness of barfcom, but I dunno how useful that would be.

    I just recently built an AR so if you have more specific questions, feel free to PM me. Plus you're OG cigar crew, so I figure we should look out for each other :naughty:
     
  8. you know me

    you know me OT where the douchbags play

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    ok dumb question but can I use a 5.56/2.23 lower to shoot a larger round?
     
  9. Yes. All the lowers are identical in their dimensions. The only thing that is different on a multi-cal lower is the engraving.
     
  10. Keesh

    Keesh New Member

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  11. you know me

    you know me OT where the douchbags play

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  12. Soybomb

    Soybomb New Member

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    The upper and magazines are what is different.

    For example if you wanted to turn your 5.56 gun into a 6.8 spc gun you'd need to change the barrel and bolt and magazines. Most people would do that by just slapping a 6.8 spc upper on the gun and putting in the mags, but the upper and lower receivers are the same. General rule is if it will fit in the magwell, its just an upper change. Bigger rounds like .308 require a whole different receiver but then its not an ar15 anymore.
     
  13. It's a standard .223/5.56 lower shooting a different cartridge. As I said before, the only difference between the multi-cal lowers is the engraving on them. They're all the same when it comes to the dimensions.
     
  14. phrozenlikwid

    phrozenlikwid New Member

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    Multi-cal lowers yield 2.55" COAL, and allow you to seat a 75MAX/223AI combo to the lands.

    So I hear.
     
  15. How? Unless you're using a different mag too. I guess back in the day there was a single stack AR mag that utilized that groove in the rear of the mag to allow you to feed rounds much longer than would work in a standard mag.
     
  16. phrozenlikwid

    phrozenlikwid New Member

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    :rofl::rofl:

    You take me way too seriously.

    If what I wrote was true, I'd have built a house out of 223AI AR's.
     
  17. :( I guess the front takedown pin and the mag release and bolt catch locations prevent you from making a slightly longer magwell. Still, if you can find those old mags they'd be one solution.


    DMPS doesn't make them anymore.

    http://www.midwayusa.com/viewProduct/?productNumber=112114
     
  18. Paul Revere

    Paul Revere OT Supporter

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    i was gonna post BS but i was late for work :o
     
  19. phrozenlikwid

    phrozenlikwid New Member

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    Hmmm... I have not seen those before. Interesting. Wonder how much room it gives?
     
  20. I don't know how much more room it gives you.
     
  21. Keesh

    Keesh New Member

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    I'm assuming they are using a different follower than angles the rounds upwards? If so, that's a fucking good idea and shouldn't be too hard to replicate.
     
  22. phrozenlikwid

    phrozenlikwid New Member

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    Yeah, but the problem you'd quickly run into there is not having enough case head to allow the bolt to pick up the round. I wouldn't mind snagging one if for no other reason than to see whats up. I'm intrigued.
     
  23. Phrozen, this is for you... I was trying to find anywhere that one could get these VLD mags, and came across this. 75 A-Max loaded to standard mag length. :eek:

    http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/ubb/showflat/Number/2703954/page/7

     
  24. phrozenlikwid

    phrozenlikwid New Member

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    Interesting.... Wonder what kinda velocity he was getting?

    There's actually a 223AI AR (the only one I've actually seen) on that site, but I can't find it at the moment as 24hr has turned into a clusterfuck.

    Still think the shortness of the mags are what really cockblocks the AR platform, given today's bullet designs.
     

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