Hi Chris and welcome. For an accurate answer I would contact Winchester Customer Service at 800-333-3288 ------------ The model here is not drilled and tapped (pause video at 4:21) - youtube.com/watch?v=JBN7d1UbTJI

Hi Chris, yes sir, taken directly from the owner's manual - "NOTICE: YOUR WINCHESTER® SHOTGUN IS DRILLED AND TAPPED FOR THE MOUNTING OF BASES AND RINGS TO ACCOMMODATE AN APPROPRIATE SCOPE OR SIGHT. ALWAYS USE THE CORRECT BASES FOR THIS SHOTGUN WITH THE APPROPRIATE LENGTH SCREWS WHICH ARE AT LEAST 11⁄32" IN LENGTH."
Stay safe & have a great day!

No, it is not. Full specs below.
SXP Camp / Field Combo Features
Aluminum alloy receiver with an Anodized black finish
Non-glare matte finish barrel with Black chrome on exterior surface
Hard chrome plated chamber and bore
12 gauge, 3” chamber
Pump-action
Black composite stock
Three Invector-Plus choke tubes (F,M,IC)
Brass front bead sight
Inflex Technology recoil pad
Sling swivel studs
18” Defender barrel included
5+1 magazine capacity with 2 3/4” shells
Specifications
GAUGE • CHAMBER • BARREL LENGTH
12 • 3" • 26"
12 • 3" • 28"
Gauge
12
Chamber Length
3"
Barrel Length
26"
Overall Length
46 1/2"
Length of Pull
13 3/4"
Drop at Comb
1 5/8"
Drop at Heel
2"
Weight
6 lbs 12 oz
Magazine Capacity
5, 2 3/4" shells
Rib Width
1/4"
Barrel Finish
Matte
Stock Finish
Satin
Chokes Included
Full, Modified, Improved Cylinder
Receiver Finish
Matte
Dura Touch Finish
No
Chamber Finish
Chrome Plated Chamber and Bore
Front Sight
Brass Bead
Choke System
Invector-Plus Flush
Barrel Material
Steel
Stock Material
Composite
Recoil Pad
Inflex 1
Checkering
Textured Grip Panels
Sling Swivel Studs
Matte Blued
Receiver Material
Aluminum Alloy
Trigger Finish
Matte

I have a Winchester pump very similair and it is not drilled and tapped.