Mike, these normally come with (1) flush Fit 6rd Magazine and (2) 7rd Magazines with Extension.

I assume you are asking about 11726 as 11746 does not cross to a S&W It comes with2 -6 round and 1 -7 round see *******UPC:
022188870169
Description:
S&W M&P SHLD 45AP 6/7RD NTS NS
Brand:
Smith & Wesson
Model:
M&P Shield
Type:
Pistol: Semi-Auto
Caliber:
45AP
Finish:
Matte Black Stainless Steel Slide
Action:
Double Action Only
Stock:
Black Polymer Frame
Sight:
Ft: Fixed Night Rr: Fixed Night
Barrel Length:
3.3
Overall Length:
6.45
Weight:
20.5 oz
Capacity:
6+1 and 7+1
*******# of Mags:
3 (One With Extended Capacity for Full Grip)
Receiver:
Polymer
Features:
Striker Fired, Short and Consistent Trigger Pull;
No Magazine Safety, 18 Degree Grip Angle