Proof Research Pre-Fit Q Mini Fix Barrel Features The Proof Research Pre-Fit Q Mini Fix Barrel is machined from stainless steel to Proof Research s exacting tolerances giving shooters a precision replacement barrel without the long lead time of a fully custom fit. Chambered in .223 Rem with a 1 in 7 twist rate the barrel stabilizes a broad range of bullet weights from lighter varmint loads up through heavier match bullets commonly used in precision shooting. At 12.75 inches the barrel keeps the Q Mini Fix platform compact while still delivering the velocity and accuracy shooters expect from a quality aftermarket barrel. The 5/8x24 thread pattern is a widely supported standard giving shooters flexibility when choosing a suppressor or muzzle brake. Proof Research built its reputation on precision rifled barrels and the Pre-Fit Series extends that reputation into a drop in format designed to simplify installation for builders and gunsmiths. At 2 pounds 1 ounce the barrel keeps weight manageable on a compact platform which matters for a Mini Fix style build where handling and balance are priorities. Because it is a pre-fit design the barrel is manufactured to headspace correctly with minimal gunsmith fitting saving time and labor over a traditional blank. For shooters looking to upgrade their Q Mini Fix with a proven stainless barrel in .223 Rem the Proof Research Pre-Fit offers precision manufacturing in a straightforward package. Proof Research Pre-Fit Q Mini Fix Barrel Specifications Manufacturer: Proof Research Model: Pre-Fit Q Mini Fix Barrel Caliber: .223 Rem Finish: Stainless Finish Type: Stainless Steel Barrel Length: 12.75 Rate of Twist: 1-in-7 Thread Pattern: 5/8x24 Weight: 2 lbs 1 oz Available At: GrabAGun