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Posted: 2/16/2012 6:37:40 AM EDT
| What size is the F marked Colt FSB? Specifically, I'm curious to know if it will fit on a 300 WTF barrel. |
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What size is the F marked Colt FSB? Specifically, I'm curious to know if it will fit on a 300 WTF barrel. They are typically bored for .750" It is possible to find one from a pencil contour that is .625 They do not interchange and are a unique pair with the barrel onto which they were installed. Installing requires a special jig and is not considered a DYI project. Some kitchen table builders have ghetto-ed used ones with set screws. 
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So someone selling a Colt F marked FSB is selling something that essentially can't be re-used? Some folks have more tools in their garages than others. They can be redrilled for new taper pins by a good machinist. Also, as someone else mentioned, a lot of guys use them with set screws - the USAMU SDM-R used a set-screwed FSB so azimuth adjustment could be done with both front and rear sights. ~Augee |
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They can be redrilled for new taper pins by a good machinist. A good machinist would use a blank and do it right. It's a cheap part. Also, as someone else mentioned, a lot of guys use them with set screws - the USAMU SDM-R used a set-screwed FSB so azimuth adjustment could be done with both front and rear sights.
These were not "ghetto-ed". There are flats machined into the barrel for the set screws to bear against for this application. |
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Thanks all. Guess I'll get something else. If you need to add an FSB one way is with the Armalite Clamp-on FSB Not as secure as pinned. May not be F-marked. |
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