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Thread: 7.5 vs. 10.5

  1. #1
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    7.5 vs. 10.5

    I've decided my next purchase will be a SBR. Is there much of a reliability issue with the 7.5? I've bought Noveske in the past and have spoken with them about this issue but would like to hear from someone who shoots one. I've also chronoed 20, 16, 14.5, and 10.5. How much more loss would you expect with the 7.5? I've considered just buying the stripped lower and submitting my own paperwork and then buying the upper. For those that have done that can you include the various lenghts on the form without actually owning them yet so you can put whatever you want on the lower?

  2. #2
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    Cool Shorty SBR's...

    Quote Originally Posted by seb5 View Post
    I've decided my next purchase will be a SBR. Is there much of a reliability issue with the 7.5? I've bought Noveske in the past and have spoken with them about this issue but would like to hear from someone who shoots one. I've also chronoed 20, 16, 14.5, and 10.5. How much more loss would you expect with the 7.5? I've considered just buying the stripped lower and submitting my own paperwork and then buying the upper. For those that have done that can you include the various lenghts on the form without actually owning them yet so you can put whatever you want on the lower?
    I have always turned in my papers for SBR's w/ the shortest length barrel I ever intend to install...
    You can have that length or longer mounted, legally, w/ your document...

    ('Also, the shorter the barrel/ system, the better for headaches w/ a gas impingement system...)
    I use piston drive; solves that 100%

    E!

    PS - I do installs/ builds w/ Adams Arms systems...
    Drop me a note if you need something built, or just say Hi...

    gunfixer@live.com
    The Hill Sport-Tac

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  3. #3
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    Steve Troy built me a 7.5" M7A1 this past January. It's perfectly reliable and fun to shoot. Steve uses nothing but the best. I had the honor and privelage to assist him assemble it at his shop.

    Believe it or not, against all adversity, there are still some great manufacturers, gun dealers and 2nd Amendment supporters in the Peoples Republic of Massachusetts.

    http://www.troyind.com/m7a1.html




    Mike Butler

  4. #4
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    A good friend of mine had a Noveske 7.5" and it ran like a top with even the cheapest of ammo. It was a hell of a lot of fun and didn't appear to be any louder or concussive than my 10.5".

    On one hand you'll catch a lot of flak about how "it doesn't get enough velocity to fragment" but I'd recently heard that it only barely stabilizes most bullets so that may have a positive effect on ballistics.

    The only medium I'd shot it into was pumpkins with wolf ammo and it ripped a nice sized chunk out of the back ends.


    As for lengths on forms, I've heard that once short barreled you can run practically anything. I've also heard that you REALLY want to insure that you're within the law and send the ATF a fax stating that you're changing lengths permanently. I'll get you the lengths I put down on my 10.5" when I get home today.

  5. #5
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    Quote Originally Posted by erh View Post
    I have always turned in my papers for SBR's w/ the shortest length barrel I ever intend to install...
    You can have that length or longer mounted, legally, w/ your document...
    There is nothing in the NFA that states what you have stated above. As far as the letter of the law goes, you can have whatever length barrel you want on any registered SBR. The ATF asks that you notify them if you permanently change the configuration but it is not required. Any advice to the contrary is your opinion and while it may be prudent it is also not necessary.

  6. #6
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    Question

    So does anyone have any velocity stats on a 7.5" setup with some of the more popular ammo choices (M855, M193, etc)?

  7. #7
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    Both my SBRs are listed as having 10.5-inch barrels. But when I talked to the ATF NFA Branch they recommended that I send them a letter informing them of any changes or additional caliber or configurations (i.e.: barrel length). FWIW.
    We must not believe the Evil One when he tells us that there is nothing we can do in the face of violence, injustice and sin. - Pope Francis I

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