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Thread: New Grendel budget upper

  1. #1
    Unwashed
    Join Date
    Jul 2017
    Location
    indiana
    Posts
    9

    New Grendel budget upper

    Finally got to shoot the Grendel today and i am very happy with the results. I shot with Federal fusion msr 120gr -hornady black eld match 123gr and hornady SST 123gr. the rifle did not like the SSTs , I would have 2 in a group the the next one would be 5-6 in away? It also didn't like it when I shot a lower with a carbine buffer on it. had 2 extraction issues and the cases were coming out at about 1 oclock when I tried that(you can see marks on receiver in pic) any thoughts on this would be appreciated. performed flawless with the A2 stock.

    Sanders Armory SS HBAR TYPE2 1/8 mid with fat comp break
    billet side charging upper
    Sanders Armory 16.5 keymod rail

    RTBA cerro forge 80% lower w/ Anderson lpk / ALG defense ACT trigger
    SWFA SS 10x42

    100_3134 (800x600) (800x600).jpg100_3129 (800x600).jpg100_3133 (800x600).jpg100_3135 (800x600).jpg

  2. #2
    Bloodstained
    Join Date
    Dec 2016
    Location
    Angier, NC
    Posts
    59
    Don't worry to much about the brass, it wont last long. Ive had three new builds do the same thing the first 100 rounds. Do watch out for over-gas. Over-gas has been more of a problem that anything.

  3. #3
    Chieftain
    Join Date
    Mar 2011
    Location
    SE Il
    Posts
    2,014
    Sounds like the upper was over gassed while using the lighter buffer and carbine spring. Is that an 18" barrel with mid length gas system?

    If you try the lower with the carbine buffer tube, carbine length spring you might try a H-2 buffer which is heavier.

  4. #4
    Bloodstained
    Join Date
    Dec 2016
    Location
    Angier, NC
    Posts
    59
    Personally, Id get myself a Radical adjustable gas block and solve any gas problems I might be having. For less than 40 bucks, it will tame what recoil you do have, and increase muzzle velocity, and accuracy. It smoothed out my actions considerably.

  5. #5
    Unwashed
    Join Date
    Jul 2017
    Location
    indiana
    Posts
    9
    thanks guys, it is an 18" mid length and I will probably go with the rifle buffer set up.

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