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AR15.COM
2/21/2026 8:16:20 PM EDT
I got an older X5 and was wondering what the deal is with this hole. Is there supposed to be a roll pin there?

2/21/2026 8:52:35 PM EDT
[#1]
I am not sure what its for but an image search shows all.of them having it
2/22/2026 11:45:17 AM EDT
[Last Edit: patw][Edited] [#2]
It is normal and not something to fill in. It's machined for the extractor in the milled slides as the models don't have a removable breech block, like the older stamped slides do.
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