I agree, I drilled and tapped my maverick 88 20 gauge, it's aluminum. I ordered everything from brownells. My mossberg was drilled and tapped from factory, I just went with the same threads; #28 drill bit and an 8-40 tapered tap. Works fine for the weaver mount and the truglo red dot. It is a dedicated turkey rig so everything hot loctite and has been fine for 3 years.
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