Proof Research PR15 PXT Stainless Steel Barrel – 6mm ARC 18″

Elevate your AR-15 platform with the Proof Research PR15 PXT Stainless Steel Barrel in 6mm ARC, 18″ length — a premium drop-in upgrade engineered for shooters who demand match-grade accuracy and long-term durability. Proof Research is widely recognized as one of the most respected names in precision barrel manufacturing, and this barrel exemplifies their commitment to excellence.

Constructed from high-quality stainless steel, the PR15 PXT barrel delivers exceptional rigidity and corrosion resistance, making it well-suited for demanding field conditions and extended range sessions. The 6mm ARC (Advanced Rifle Cartridge) chambering offers outstanding long-range performance from the AR-15 platform, providing superior ballistic efficiency, reduced wind drift, and impressive retained energy at distance — ideal for precision shooters, hunters, and competitive marksmen alike.

The 18″ profile strikes a versatile balance between velocity optimization and maneuverability, making it a popular choice for both hunting applications and precision rifle competitions. Whether you’re building a purpose-driven long-range hunting rig or a competition-ready precision AR, this Proof Research barrel is a proven foundation for an accurate, reliable build.

At Deep Roots Rifle Co, we stock hard-to-find premium components like this Proof Research barrel so you can build with confidence. Our knowledgeable staff is available to help you select the right components for your custom build, whether you’re shopping online or visiting our gun store in Eustis, Florida. Order online today or stop by the shop — we’re here to help you build exactly what you need.