M&P 9C - What Do Dimples On Barrel and Slde Mean?

[shlike]

While cleaning my 9c today after a range trip, I noticed that on the underside of the slide there were three dimples and on the underside of the barrel there was one tiny dimple. The gun is about one year old. What do the dimples signify, if anything?

 

[dullh]

if it has dimples it must be cute as a button!

 

[L Pete]

My old 9c has 4 dimples...

Does that mean mine is more cute?

 

[bxny10455]

A lot M&P owners claims it signifies a newer barrel. I haven't ask S&W to confirm it.

 

[Johnmuratore]

I thought we all decided it just indicated which machine produced the part?

 

[AR-Getsome]

View attachment 150881Pic of the Day: New Production M&P Barrel | Modern Service Weapons
This site talks about the updates. I have heard about the slide dimples meaning which machine made the parts. But some of the newer barrels have either 1 or 2 dimples. I'm sure there are more than 2 machines making the barrels. So I'm leaning towards the dimples in the barrels having newer 1:10 twist barrel. The top barrel in my pic is my 9c made nov 2012. The bottom is my FS9 about 5 months older. I guess I can just measure the twist to see what I get.

 

[Rastoff]

I thought we all decided it just indicated which machine produced the part?

This is correct and has been verified by S&W a couple of times. The dimples only denote a particular machine or process.