Yes that is a heavy barrel model, but you'd have to have buds remove the 30rd magazines and they don't replace them with compliant ones, or you could just buy the MD compliant model that ships with 10rd magazines
budsgunshop.com/product_info.php/products_id/34869/ruger+ar+223+remington+%7C+556+nato+16in+10rd

I would check with my local FFL find out what he has and his prices

Then the free floated, optics ready version, with HBAR and compliant mags here
budsgunshop.com/product_info.php/products_id/114528/ruger+8537+ar-556+223+rem556+nato+161+10%2b1+6-position+collapsible+stock+black+hardcoat+anodized

Antonio, struggle no more, this is it. Equipped with a heavy contour, cold hammer-forged alloy barrel with 1:8" twist rifling that provides exceptional accuracy with bullets from 35 to 77 grains. Details here >>> ruger.com/products/ar556/specSheets/8529.html .....Have a great day!

Antonio, yes Sir : This version of the AR-556 AR-15 sports a heavy-contour, cold hammer-forged barrel with ultra-precise rifling to provide exceptional accuracy, longevity and easy cleaning. --- Also : budsgunshop.com/product_info.php/products_id/77543/windham+weaponry+r16a4t+m4+a3+223+16+hb+flat+30r