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Thread: Idle lower help

  1. #1
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    Idle lower help

    I have a full Daniel Defense SBR with a 9" 300 Blackout barrel. Given the current ammo situation, I haven't been shooting this gun lately. It's basically retired. But I could atleast still use the lower! So I've looked into acquiring a new upper in 223/556. Question is, what barrel length do I want?

    I currently own a BCM 11.5" (AAC M42K suppressed) and a S&W 16" carbine.

    I'd like to go with a 10.5" LMT upper for the DD lower. I have a Noveske KX3 Pig laying around to use if I go that route. Something tells me to stay away from an NFA upper at this time and go with a tried and true 16". But what's the point? I already run a 16" with the S&W.

    Ultimately: KISS. I have a carry handle rear sight, and I want it to be carbine length because I have some plastic hand guards.

    Should I shoot for middle ground with a 12.5 or 14.5? Or would a carry handle 10.5" fit my collection better?

    Should I just wait to see if the 300 BLK ammo will come back around?

    Will it?
    Last edited by matemike; 07-23-13 at 08:11.
    “Twenty years from now you will be more disappointed by the things you didn’t do than by the ones you did do. So throw off the bowlines, sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.”
    - Mark Twain

  2. #2
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    Do you think your lower is lonely without it? If you already have other carbines that are fitting the role why bother? I guess if you have money to burn then go for it.



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  3. #3
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    Agree with Iraqgunz. Ultimately you can only shoot one gun at a time. Maybe consider waiting until there is something you really want instead of just buying for the sake of it? YMMV

  4. #4
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    If I were in your shoes, I would see three choices

    1) Build a 20" precision upper. An 18" upper is so similar to 16" in ballistic performance, it'd be redundant
    2) Build a dedicated suppressed upper. In all honesty I don't know if it's worth having two SBR uppers, one dedicated to full time suppressed use and one dedicated to non-suppressed used or not
    3) Keep the money handy so that if you come on a deal for ammo, you can pounce on it like a fat kid on a Snickers bar. Having all the uppers in the world will do no good without ammo

    Option#3 is the most practical
    Last edited by MistWolf; 02-26-13 at 13:56.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  5. #5
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    Quote Originally Posted by MistWolf View Post
    An 20" upper is so similar to 18" in ballistic performance, it'd be redundant. An 18" upper is so similar to 16" in ballistic performance, it'd be redundant.
    Fixed

  6. #6
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    I say build your next upper OP, all the firearm related buying frenzy helps by jumpstarting the economy...
    'Evil Minds That Plot Destruction'

  7. #7
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    Quote Originally Posted by nml View Post
    Fixed
    LOL!

    But there is a greater difference between the 16" and 20" than there is between the 16" & 18" or 18" & 20".

    If matemike had an 18" upper, I would not suggest a 20". Wouldn't suggest a 16" either.

    A 16" AR will do about anything you ask it to and it is effective at longer ranges. But I do notice a difference in hold-overs between it and a 20".

    Sometimes I think we make too make fuss over the differences in performance and handiness between barrel lengths, but still like that we have choices
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  8. #8
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    Of course. Glad you knew it was tongue in cheek. If they didn't have uses you wouldn't have 24/26" 223 match barrels.

  9. #9
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    Thank you for the replies.

    I resurrect this thread because I've since found more .223/5.56 ammo, but no 300 blackout. And I've started to see more and more .223/5.56 upper receiver assemblies in stock.

    Still wondering if I want to go with a spare 10.5" since I have the stamp, or just get a 16" that could one day live on a non-NFA lower. (spares always turn into more guns though)

    I do not want to go precision with 18" or 20+" because this will be very KISS. I'm talking carry handle and carbine length plastic hand guards. No $1K scopes or anything like that. (those are on my .308 and 7mm Rem bolt guns)

    There's got to be somebody with 3 or 4 plus AR's. What lengths are you running/collecting?
    Last edited by matemike; 07-23-13 at 08:37.
    “Twenty years from now you will be more disappointed by the things you didn’t do than by the ones you did do. So throw off the bowlines, sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.”
    - Mark Twain

  10. #10
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    Idle lower help

    I don't have them all done but this is what I'm working on:

    -An SBR with a red dot and irons.
    -A 16" with 1-4 powered optic for 3 gun and other use.
    -A 20" with a 2.5-10x viper pst or similar for longer range.

    That will cover any type of shooting I need to do with a 5.56 without having builds that will never get used. I wouldn't build any more in the same caliber once those were all covered.

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