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Thread: ar 15 uppers brands

  1. #21
    Boolit Master
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    Quote Originally Posted by lefty o View Post
    i can guarantee not all the manufacturers hold good tolerances. as an example, i have built a large number of ar's on anderson lowers, they are mostly good, but i have myself run into 2 that the buffer retainer pin holes were not in the correct place, and sadly you can find more than a few instances of this if you look around. as for mil-spec, nothing being sold is mil-spec, much is advertised as meeting mil-spec but thats it, and mil-spec is just the gvmnt's lowest acceptable standard, nothing to be impressed by.
    Please do publish the mil spec standards or the lowest acceptable standard as you put it.

  2. #22
    Boolit Master



    M-Tecs's Avatar
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    Quote Originally Posted by 6bg6ga View Post
    Please do publish the mil spec standards or the lowest acceptable standard as you put it.
    Posting the total mil specs standards for all the parts is an AR would require many volumes of encyclopedia sized books. Some basics here

    http://fulton-armory.com/faqs/AR-FAQs/Mil_Spec.htm

    https://www.americanrifleman.org/art...ec-definition/

    http://www.thetruthaboutguns.com/201...-keep-it-real/

    https://sofrep.com/82257/ar-15-isnt-mil-spec-thats-ok/

    http://optimusdefense.com/image/data...inspection.pdf

    https://www.itstactical.com/forum/in...ams-and-specs/
    Last edited by M-Tecs; 01-09-2018 at 07:51 PM.

  3. #23
    Boolit Master lefty o's Avatar
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    Quote Originally Posted by 6bg6ga View Post
    Please do publish the mil spec standards or the lowest acceptable standard as you put it.
    what does it matter, you are not buying mil-spec commercially!

  4. #24
    Boolit Master Texas by God's Avatar
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    According to Colt, FN, and HK you are.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

  5. #25
    Boolit Master Texas by God's Avatar
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    Forget it. I thought we we talking about the parts used to make up the gun. The FN15 I bought when I started messing with ARs had numbers and marks on the bcg and other places denoting milspec parts. Since they made M4/M16A2 for our military under contract they knew what they were stating. Sorry for the thread drift.
    Last edited by osteodoc08; 01-10-2018 at 05:01 PM. Reason: Edited for content

  6. #26
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    Let's refocus the discussion please.

  7. #27
    Boolit Man Gtrubicon's Avatar
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    I have a 50 Beowulf from Alexander arms, they invented the Beowulf cartridge. I purchased there 16Ē overwatch model. I have a very simple fixed power scope zeroed @ 100yds. It shoots 3 shot groups with all holes touching. Thatís with their factory ammo. I am very pleased with the upper as a whole.

  8. #28
    Boolit Master






    Lloyd Smale's Avatar
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    my beo doesn't shoot quite that well. But that said all ive shot out of it are rieneer bullets and cast. with the reineer TN bullet it shoots an inch at a 100 for 5 shots and with there hp version it opens up to about 1 1/4. Still pretty darned good for a big bore. It outshoots any 4570 ive ever owned. How do you get away with owning that in CA? Did you mount it to a fixed mag lower? If so does it run well like that.
    Quote Originally Posted by Gtrubicon View Post
    I have a 50 Beowulf from Alexander arms, they invented the Beowulf cartridge. I purchased there 16” overwatch model. I have a very simple fixed power scope zeroed @ 100yds. It shoots 3 shot groups with all holes touching. That’s with their factory ammo. I am very pleased with the upper as a whole.
    Soldier of God, sixgun junky, Retired electrical lineman. My office was a 100 feet in the air, closer to God the better

  9. #29
    Boolit Man Gtrubicon's Avatar
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    The 50 Beowulf is legal in California. The 50 bmg is not. It’s on a standard lower.

  10. #30
    Boolit Master






    Lloyd Smale's Avatar
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    I thought you couldn't have a standard lower in CA and had to have a top fed magazine on an AR15 along with one of those goofy thumbhole stocks????
    Soldier of God, sixgun junky, Retired electrical lineman. My office was a 100 feet in the air, closer to God the better

  11. #31
    Boolit Master
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    Quote Originally Posted by 6bg6ga View Post
    Most of this is pure horse hockey. You buy MILL SPEC parts and the tollerances ARE the same. You MIGHT be able to get slightly better finish but the fit will be the same.
    In theory you are correct in reality you are not. Try swapping uppers and lowers around and you will find some are tight and some well not so much. Does it matter? I donít know. Point being with the large number that make AR stuff lately some will not do as good of a job at it.

  12. #32
    Boolit Mold bad311's Avatar
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    Quote Originally Posted by 6bg6ga View Post
    Most of this is pure horse hockey. You buy MILL SPEC parts and the tollerances ARE the same. You MIGHT be able to get slightly better finish but the fit will be the same.
    Well said. Mil spec is mil spec!!

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check