The Rosco Purebred 13.7-inch barrel is built for SBR and RECCE-style AR-15 builds, balancing close-quarters handling with the ability to make first-round hits out to 300 yards. It uses a government profile and a mid-length gas system tuned for smooth operation and proper dwell time. The chamber is .223 Wylde, which handles both .223 Rem and 5.56 NATO.
- Length: 13.7 in.
- Chamber: .223 Wylde
- Profile: Government
- Gas system: Mid-length
- Twist: 1:8
- Thread: 1/2x28
- Material: 416R stainless steel
- Finish: Bead blasted
- Manufacturer part number: PB-137-GVT-223W-8-M
