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Thread: Midlength barrel with non-F-marked FSB

  1. #11
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    How did you reach this conclusion since he hasn't told us yet who makes the barrel?

    You do realize that Bushmaster for example put non F-marked bases on almost all of their AR's over the years, right?

    Quote Originally Posted by 0reo View Post
    I think its possible the op either didn't notice in the ad which version of the front sight came with the barrel, or perhaps the vendor didn't make that information clear. In this case not right for the op does not necessarily mean manufacturer fault.



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  2. #12
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    Re: Midlength barrel with non-F-marked FSB

    I reached no conclusion. I only offered an alternate posibility.

  3. #13
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    I appreciate everyone's input. I plan on measuring the base when i get home from work today.

    I tend to agree with Iraqgunz: I paid a decent amount for the barrel and expect to get something made to the right specs. Today's standard is flat topped receivers. Additionally, its my understanding that installing a new FSB is not possible, at least not without the exact original fixture and drill settings. Generally, taper pins holes do not seem to be drilled to an exact spec and are often drilled to different depths and at different angles.

    If it is not the F-marked height, i plan on addressing it with the manufacturer. The ad for the barrel is not specific relative to the FSB, but on their website, ads for their full carbines all state that F-marked FSBs are used. A reasonable person would assume that a barrel assembly would come with the same (again, it is the contemporary standard for well made AR parts)

    Re: the name of the manufacturer, i think its only prudent to hold off on mentioning their name until after I A) verify the height and B) contact them.

    Thanks again for the help.

  4. #14
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    Quote Originally Posted by Iraqgunz View Post

    You do realize that Bushmaster for example put non F-marked bases on almost all of their AR's over the years, right?
    Don't some of these companies also supply the taller post with the non-F marked bases so the weapon will at least zero? Even if its "wrong".
    Last edited by Clint; 03-07-13 at 12:56.
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  5. #15
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    Dude, I am actually looking for a mid length barrel with a non F marked front sight post to accompany the A2 upper I have here. Please pm me with details.

  6. #16
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    Not always. The Remingtons I mentioned were sold with the carry handle and changed by that agency. They were unaware of the difference and the front sight post was a standard height.

    I have seen BM carbines that had standard front sight posts in them from the factory.

    Quote Originally Posted by Clint View Post
    Don't some of these companies also supply the taller post with the non-F marked bases so the weapon will at least zero? Even if its "wrong".



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  7. #17
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    Quote Originally Posted by Iraqgunz View Post
    You can't just replace them because each barrel is drilled and pinned separately which means that depending on how it was made it could be canted or the holes for the FSB pins will not line up right.
    My mistake they all look the same so i forget the pits have to be drilled for each base. I would wory about the taller pin just like the department from Australia you referred to.

    In this situation what would you do if the situation was not remedied by the manufacturer? If you don't mind elaborating on what you would do in a situation such as this.

    Im interested to hear how you would handle this situation. I have an idea of what i would do in this case, and i wonder if Im in the ballpark.

  8. #18
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    I can't say since I don't know who the manufacturer is. Plus we all have different tastes. Since I have a few FSB carbines/rifles I would put a low pro on it and move on.

    Quote Originally Posted by jstone View Post
    My mistake they all look the same so i forget the pits have to be drilled for each base. I would wory about the taller pin just like the department from Australia you referred to.

    In this situation what would you do if the situation was not remedied by the manufacturer? If you don't mind elaborating on what you would do in a situation such as this.

    Im interested to hear how you would handle this situation. I have an idea of what i would do in this case, and i wonder if Im in the ballpark.



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  9. #19
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    What about the Colt 6720's. They do not have a F marked FSB. Do they need to be sent back to Colt and replaced ??
    Last edited by sr71plane; 03-08-13 at 07:35.

  10. #20
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    Quote Originally Posted by Iraqgunz View Post
    I can't say since I don't know who the manufacturer is. Plus we all have different tastes. Since I have a few FSB carbines/rifles I would put a low pro on it and move on.
    Can it be drilled again for a new fsb or would that be removing to much material? Sorry for the stupid question.
    Last edited by jstone; 03-08-13 at 20:47.

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