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Thread: 18" Precision AR Questions

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  1. 09-13-15, 09:59 #1
    SeaSoldier
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    18" Precision AR Questions

    Please help educate the ignorant. When I was in the USMC I had a 20" M16 with open sights. 25 years later and the eyes not what they used to be I want/need optics. I ended up with a Leuplod MK4 MRT 2.5-8 scope so I have the optics covered. I want to build or purchase a precision AR with an 18" barrel. Is there anything to be gained by using a matched Megalithic rifle length upper and lower over a more traditional upper/lower. Barrel would most likely be a Rainier Arms ultra match. This rifle will only be used to poke holes in paper or ring steel plates out to around 600 yards. Other options would be to purchase a complete 18" precision upper and lower from the likes of BCM. If I go the traditional upper/lower route is there a 15" rail that would be the best for this application?
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  2. 09-13-15, 10:11 #2
    colt933
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    I have 2 DD CHF S2W 18" barrels and they're both sub 3/4 MOA with mk262 clone loads. Neither are in a monolithic upper.
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  3. 09-13-15, 10:19 #3
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    waveslayer
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    I bought a Rock River Arms upper in their R3... it's a tack driver out of the box. I reloaded some 77 smk's. yeah its a keeper. they guarantee you 3/4 MOA accuracy with a lot of their uppers. not many big name brands will do that.

    5 shots at 100 yards. the squares are 1 inch.
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  4. 09-13-15, 10:35 #4
    SeaSoldier
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    Thanks for the info gents, exactly what I am looking for. Any thoughts on which 15" rail would be optimal? I have also been looking at a Noveske Gen 2 lower with a Vltor upper. Thoughts, am I tracking right?
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  5. 09-13-15, 10:38 #5
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    waveslayer
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    Quote Originally Posted by SeaSoldier View Post
    Thanks for the info gents, exactly what I am looking for. Any thoughts on which 15" rail would be optimal? I have also been looking at a Noveske Gen 2 lower with a Vltor upper. Thoughts, am I tracking right?
    what's your goal in your rail, functionality to hang all sorts of trinkets or light? I like the Lancer Carbon stuff and even AA's carbon rail in 10 inch
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  6. 09-13-15, 10:55 #6
    SeaSoldier
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    I'm looking for rigidity. Probably just an Atlas bipod.
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  7. 09-13-15, 10:57 #7
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    Quote Originally Posted by SeaSoldier View Post
    I'm looking for rigidity. Probably just an Atlas bipod.
    I have a few carbon ones with just a single rail attachment at the bottom for my Atlas and Harris bipods. nice and light, but some of the new key mods are cool and very light
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  8. 09-13-15, 18:27 #8
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    LOL I will go and shoot a 30 shot string for you. but to be far how fast did you shoot? I will accept this challenge.
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  9. 10-07-15, 00:07 #9
    johnson
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    Quote Originally Posted by waveslayer View Post
    LOL I will go and shoot a 30 shot string for you. but to be far how fast did you shoot? I will accept this challenge.
    Still waiting for this...
    People start out wanting to do shooting as a hobby and it ends up their hobby is actually buying and operating expensive tools. Doesn't make sense when you think about it.
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  10. 10-07-15, 01:44 #10
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    Quote Originally Posted by johnson View Post
    Still waiting for this...
    will do once I'm back from traveling, been having it rough in Hawaii for work...

    and then I will make up some loads since I'm down to about 15. so you don't have to hold your breath
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