S&W has not yet submitteed the paperwork to make the 5" M&P Pro 40 legal for Production.
Here's the approved list:
USPSA/NROI Production Gun List - USPSA - United States Practical Shooting Association
1006 (38 oz.), 1066 (38.5 oz.), 39 (26.5 oz.), 3913 (25 oz.), 3913L (25 oz.), 3913TSW (24.8 oz.), 3914 (25 oz.), 3953 (24.8 oz.), 3953STSW (24.8 oz.), 4006 (38.5 oz.), 4013TSW (37.8 oz.), 4043 (30 oz.), 4046 (37.8 oz.), 4053TSW (26.7 oz.), 410 (28.5 oz.), 439 (30 oz.), 4506 (40.5 oz.), 4513TSW (28.6 oz.), 4553TSW (28.6 oz.), 4566 (39.1 oz.), 457 (29 oz.), 4586 (39.1 oz.), 59 (27 oz.), 5904 (26.5 oz.), 5906 DA/SA (37.5 oz.), 5946 (39.5 oz.), 659 (39.5 oz.), 669 (26 oz.), 6906 (26.5 oz.), 6946 (26.5 oz.), 908 (24 oz.), 910 (28 oz.), M&P 357 Sig Compact 3" (24.7 oz.), M&P 357Sig 4" (28.7 oz.), M&P 40 4" (27.5 oz.), M&P 40 Compact 3" (24.4 oz.), M&P 45 4" (27.9 oz.), M&P 45 Compact 3" (27.3 oz.), M&P 45 Full Size (28.9 oz.), M&P 9 Compact 3" (24.2 oz.), M&P 9L 5" 9mm (28.2 oz.), M&P 9mm 4" (27.2 oz.), M&P Pro series 5" 9mm (29.2 oz.), Sigma models Compact SW9V (26 oz.), SW40C (26 oz.), SW40F (26 oz.), SW40V (24.4 oz.), SW40VE (24.4 oz.), SW99 9, 40 & 45 (26 oz.), SW9C (25 oz.), SW9F (26 oz.), SW9M (18 oz.), SW9VE (24.7 oz.)
(Any DAO or DA/SA revolver with a barrel length of up to 8.5" is approved)