S&w m&p 9 shield question

[tdanielran]

I have a regular stock shield. What is he purpose of these holes inside the slide of my shield?
Thanks


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[MyOdessa]

The holes are for ejection port, barrel and recoil spring assembly. You also have 5 circular indentations, no idea what they are, but probably have something to do with manufacturing assembly.

[Mauserguy]

They are for hardness testing during manufacturing.

['ol shooter]

From the S&W Forum:

The dimples are to indicate which CNC machine made the piece. Some say it's braille for the blind (Visually Challenged for the PC crowd) QC department.

[Jimi Jah]

I thought they were to balance the slide.

[eswrite]

A cruel joke on the CA DOJ to see if they'd actually think these dimples perform micro-stampting.

[Sapperforward]

Machining marks for identification.

[khiemp]

Lightning dimples for a lighter and faster slide for more pew pew