Tony, no, this is chambered in 5.56 NATO. Like 223 wylde you can fire both 223 rem and 5.56 NATO through it. Hope this helps.

Hi Tony, this model is not .223 Wylde. It is chambered in 5.56 NATO, as seen on the ATI web site here >>> https://dist.americantactical.us/product/ati-ar15-milsport-ria-p3p-blk-5.56-16-bbl-18-phos-10-ml-sr-1-stock-nano-parts-kit-30rnd ,
Stay safe & have a great day!

no it is chambeed in 5.56 Nato seeLEGAL IN MD WITH 10 ROUND MAG - 16" BARREL IS HEAVY BARREL WITH NO CONTOURS.
Manufacturer American Tactical Inc
Model MIL-SPORT
UPC 819644025290
Action Semi-Auto
Barrel Finish Black Phosphate
Barrel Length 16"
Barrel Length In Inches 16.0000
Caliber 5.56x45mm NATO
Capacity 30+1
Checkering N
Detachable Magazine Y
Dimension 4.00 X 14.30 X 42.50
Grips Black Polymer
Hand Right
Handguards M-Lok
Hinged Floorplate N
Magazine Capacity 30.0000
Max Capacity 30
Metal Color BLACK
Metal Finish Colored
Metal Finish Group Black
Overall Length In Inches 34.2500
Rate Of Twist 1:8"
Receiver Finish Black
Receiver Material Polymer
Recoil Pad N
Sights Picatinny Rail
Similar Items RIT223
Stock Color Black
Stock Description Adjustable Alpha
Stock Finish Black
Stock Finish Group Black
Stock Material Synthetic
Swivel Studs N
Twist 1:8"
https://americantactical.us/product/ati-ar15-milsport-ria-p3p-blk-5.56-16-bbl-18-phos-10-ml-sr-1-stock-nano-parts-kit-30rnd

Hi Tony and welcome. Yes Sir. The ATI Milsport is an AR-15 pattern rifle equipped with a 10” M-LOK handguard. The . 223 Wylde (offers better performance for . 223/5.56 than just a 5.56 barrel) barrel is 16” long, making it a great general-purpose firearm for self-defense & hunting. Cheers and stay safe!