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Page AR-15 » Rifles, Uppers, Lowers, Barrels, and more
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Archived [ARCHIVED THREAD] - Inside diameter of Troy Alpra rail
Posted: 12/13/2011 10:35:58 AM EDT
Does anyone know the inside diameter of a 13 inch troy alpha rail? I have a project in mind but need to know the ID to see if that rail will work. Thanks much.

Link Posted: 12/14/2011 3:15:29 AM EDT
[#1]
1.385"

If you add any rails the ID will be reduced due to to the bar that the rails thread onto.

ETA: Mine has the front sight though I don't think that makes a difference.

Link Posted: 12/14/2011 8:14:31 AM EDT
[#2]
Thank you for the info. Looks like everything should fit.

Archived [ARCHIVED THREAD] - Inside diameter of Troy Alpra rail
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