This Proof Research PR15 PXT is a 16-inch AR-15 barrel chambered in .223 Wylde with a 1:8 twist. The .223 Wylde chamber runs both .223 Remington and 5.56 NATO. The 16-inch length is a common all-around choice, and the 1:8 twist covers a wide range of bullet weights.
- Brand: Proof Research
- Fits: AR-15
- Model: PR15 PXT
- Chamber: .223 Wylde
- Length: 16 in.
- Twist: 1:8
- Manufacturer part #: 152119
- UPC: 843068152119
