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AR lower reciever

Discussion in 'Rifle Country' started by stevetford, Aug 17, 2007.

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  1. stevetford

    stevetford Member

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    Ok guys, because I do not have the money to build the 3 different AR varaints that I would like at the moment I have decided to go ahead and buy the stripped lower recievers while they are avaliable. But in my search for in stock recievers I have noticed that some are caliber specific and others claim to be multi caliber. I am new to building AR's so this is unfamiliar to me. What is it that makes the lower reciever's caliber specific? For my first build Iam going to use one of the kits that includes all but the lower reciever to build a .223 varmint rifle. When my knowledge of AR's get to the point where I am comfortable building one from scratch the other 2 I plan to build will be in the .300 range and more custom.
    Anyways, before I make any purchases I want to be sure I understand these lower recievers first.Thanks for the help.

    Steve
     
  2. nalioth

    nalioth Member

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    They are marked for a specific caliber, but can be used for just about any upper you want. 9mm, 45 ACP, 6.5 Grendel, 6.8SPC, and many others will work fine with a standard .223 AR lower.

    Obviously, you can't put a .308 upper on a .223 lower.
     
  3. funfaler

    funfaler Member

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    Hey Steve,

    My experience with the AR15 receivers is that they are only "stamped" differently. There is no difference in the receiver if it is stamped 223, 5.56 or both. Also, if it is stamped "Pistol", it is still the same receiver, but was registered/logged originally as a "pistol", but spec wise, they are the same.

    What parts of the Blue Grass are you in? Near Louisville, maybe we can put your new rifle on a 500 yard range, see how it works.

    Also, there is an Appleseed shoot in Lexington on October 6-7, that would be a great place to hone some long range shooting skills.
    http://www.appleseedinfo.org

    Feel free to PM me with questions about the Appleseed shoots.

    Good luck on your build.
     
  4. JamesM

    JamesM Member

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    If you are going to order them, you might want to ask if you can get a letter stating that they are pistol lowers (can be used for rifles but not the other way around). You never know....... you might end up wanting to make an AR pistol in the future.
     
  5. stevetford

    stevetford Member

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    Thanks for the help guys. What lower reciever do I need to purchase to build a .308?
     
  6. kellyj00

    kellyj00 Member

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    you know... some fellas build lower recievers on milling machines out of 80% complete forged aluminum. hmmm.... those are only $30 (well, if you've got a milling machine and a little time)

    Now, if you've got a CNC Milling machine, you just became my best friend. Program it, sit back, drink a beer...watch it cut an AR lower receiver for you that is perfectly legal and has no serial number. Of course, you can't sell them....but you can supervise your friends making them on your equipment. That's what I hear, I'm not an ATF agent and I'm definitely not a lawyer.
     
  7. wdlsguy

    wdlsguy Member

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  8. strat81

    strat81 Member

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    An AR-10 style lower, which I haven't seen, but most likely exists. .308 cartridges are too big for an AR-15 mag well.
     
  9. Harley Quinn

    Harley Quinn Member

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    AR's without a pistol grip

    Do they have such a thing, now. So many items are made now, it is hard to keep up:uhoh:
    Guess I could go over to the AR forum and really get serious:p

    Does the kit that makes the mag, none removeable make the weapon legal in CA?

    I have not paid attention to the rules/laws of late, and was curious when reading this thread.

    Pistol grips being the big no no. How stupid can you get, A pistol grip on a bolt action rifle and it is illegal:eek:
    I believe but am not totally sure on that one. Maybe just thumb hole carbines ;)

    I could make another thread if I am stealing this one, I guess:what:

    But I thought if anyone who really knew the answer it would be a quick, no or yes :D
     
  10. DogBonz

    DogBonz Member

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    Dpms

    DPMS makes a very nice stainless steel lower for the 308 length group of cartridges.
     
  11. Blackbeard

    Blackbeard Member

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    Funny, all of my pistols have pistol grips.....uh oh!!!!!
     
  12. RockyMtnTactical

    RockyMtnTactical Member

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    AR15 lowers are the most common. You can do a variety of calibers in an AR15 lower, most common is .223/5.56.

    For .30 caliber rifles, you'll need AR10 lowers... (although the 7.62x39 is short enough to use a AR15 lower).
     
  13. MudPuppy

    MudPuppy Member

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    Correct me if I'm wrong, but the "big" AR uppers for the 308s are in two different and non-interchangable styles? The DPMS and Armalite? (meaning the uppers must match the lower.)

    My dpms AR-15 lower is marked .223/5.56, while my Olympic is marked Multi.
     
  14. RockyMtnTactical

    RockyMtnTactical Member

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    Mudpuppy, you are correct, there is not the same exact specs with various AR10s out there like there tends to be with the majority of AR15's.
     
  15. Harley Quinn

    Harley Quinn Member

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    So are there any ar15s that have a look about them like this in a kit :confused: Or with out the pistol grip???

    http://www.equipped.com:80/Kel-Tec_SU-16_Review.htm

    It looks like something would need to be drasticly changed.
    But hey, never know until some one makes up something:what:

    I know start a new thread
     
  16. Avenger29

    Avenger29 Member

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    Well, for the AR design, there are a couple of options to get aroun the PG thing. One is a Monsterman grip.

    The AR design, with the bolt buffer extending into the stock, kind of makes it hard to use a sporting stock like an AK/ gas piston design. You could go with a gas-piston upper, though.

    The SU-16 is a gas-piston gun, so it does not have the buffer tube assembly to deal with...
     
  17. Harley Quinn

    Harley Quinn Member

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    Avenger29
    Thanks for the information. I purchased a Kel Tec recently and was just curious.
    Living in CA the kel tec is a good one. I understand the 20 round mag is ok if you had them prior to the law of elimination.

    I checked out this site and it helped establish what you are saying about this also:

    http://www.world.guns.ru/assault/as18-e.htm

    Gives some good information with pics.

    Plus this variation of what I was mentioning, but still a thumb hole. Daewoo was short lived.

    http://www.world.guns.ru/assault/as32-e.htm
     
    Last edited: Aug 20, 2007
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