Indentations on underside of M&P 9mm slide

[rangerat]

Great forum! This is my first post. Here goes...

My new M&P 9mm has three "indentations", each about the size of a BB, on the underside of the slide just forward of the ejection port. They seem to be machined and coated.

A S&W gunsmith says they are "bedding points" used to hold the slide in place during production.

I've checked three other M&P 9mm's and none have these "indentations". The S&W rep responded that the other guns may have come off a different production line, but I find it hard to believe that the production process varies that much from line to line.

Has anyone else seen these "indentations"???

 

[rangerat]

Great forum! This is my first post. Here goes...

My new M&P 9mm has three "indentations", each about the size of a BB, on the underside of the slide just forward of the ejection port. They seem to be machined and coated.

A S&W gunsmith says they are "bedding points" used to hold the slide in place during production.

I've checked three other M&P 9mm's and none have these "indentations". The S&W rep responded that the other guns may have come off a different production line, but I find it hard to believe that the production process varies that much from line to line.

Has anyone else seen these "indentations"???

 

[dennis40x]

Yes

 

[Howard B]

My M&P Pro has them as well. I have no idea regarding their purpose.

 

[WR Moore]

Allegedly, they id the machine used to perform the machining operations on the slide. That way, if there's ever any issues at any time, only slides with a specific number/location of holes need be recalled.

 

[Fastbolt]

We were told in the armorer class that those markings identify the CNC machine/operator/manufacture date information.

 

[hberttmank]

rangerat, howdy and welcome.