no.4buck Posted December 21, 2021 Share Posted December 21, 2021 Hello All, Bought a Benelli M4 recently. Looks like it has blueish receiver I noticed inside the receiver there are these two straight "lines" that run the length of the receiver right up to the follower. Not sure of you can see it in the picture as the light only partially reflects it. In the 2nd attachment, I have drawn a white arrow pointing to the line. I was curious if this is an inherent part of the machining process? The "lines" seem to be raised as I can slightly feel them running my fingers over that part of the inside of receiver. Thanks everyone! Quote Link to comment Share on other sites More sharing options...
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