I have both bottom metals sitting here it looks like the shape is different . The surgeon sides are straighter so it would seem the PTG would fit with a gap but the nose and trigger guard radius's are also different just by looking.
I was reading about DBM inletting on @LongRifles Inc. website/online store and Mr Dixon covers the Surgeon pretty well. Exactly the same as you describe, wider throughout.
I was reading about DBM inletting on @LongRifles Inc. website/online store and Mr Dixon covers the Surgeon pretty well. Exactly the same as you describe, wider throughout.
The big advantage being wider if someone does a bad job inletting for the m5 shape you could recut to the larger inlet . Provided they didnt cut too far off.
Most factory stocks are cut for the PTG or M5 shape.