The Ruger Precision prefit replacement barrel threads directly into the receiver for a match fit. Our custom barrels have more chambers, lengths, calibers, and threading options than factory with tighter tolerances and tuned chambers for better performance. When replacing your RPR barrel all that is needed is a set of headspace gauges and an AR15 barrel nut wrench. Take your RPR to the next level with our Preferred Barrels drop in replacement.