BudsGunShop.com - Frame and barrel

James, this UPC Pistol has a "Black Anodized" Alloy Frame and "Bull Barrel" (bushing less). ((Complete Specifications and Features)): - Item Number: 1911U-45-BSS - Caliber: .45 ACP - Action Type: SAO - Trigger Pull SA: 5 lbs - Overall Length: 6.8" - Overall Height: 4.8" - Overall Width: 1.4" - Barrel Length: 3.3" - Sight Radius: 4.7" - Weight with Magazine: 28 oz - Magazine Capacity: 7 Rounds - Sights: Low Profile SIGLITE Night Sights - Grips: Custom Blackwood grips - Alloy Frame Finish: Black Hard Anodized - Slide Finish: Nitron - Features: Custom Blackwood grips, Beavertail Frame.

it is a alloy frame and has a bull (bushing less) barrel

"The two-tone Ultra Compact’s signature features are its 3.3-inch barrel and short grip alloy frame. The bull barrel is fitted to the slide, so there is no barrel bushing, and it measures 0.70 inch at the muzzle. The muzzle is precision crowned." Alloy frame, sir and a bushingless bull barrel, that is crowned.