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Is the FSB pre drilled for taper pins? — 1 Answer

by jj, from TX, United States Asked on November 27, 2023

Name Ballistic Advantage FSB F w/ Delta Assembly Top Mounted Fixed Iron Sight (4.2)
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Answered by Philbus, member, from CA, United States, on November 11, 2025

They can't be pre-drilled. It has to be drilled after positioning it onto the barrel. when you drill it out it also partially drills through the bottom edge of barrel creating a groove in the barrel for the pin to grab. You also need a tapered reamer tool to taper the hole and make it fit correctly.

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