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Old 02-27-2021, 03:38 PM
Col. Colt Col. Colt is offline
 
Join Date: Oct 2013
Posts: 453
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I think they are very close to the original USMC dimensions. And the Marines never had to notch their bolts, using standard Unertl height mounting blocks.
If you need more height, just order taller blocks from Steve Earle. CC
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