The Faxon Match Series Complete Upper is built for shooters who want a compact setup without giving up consistency or component quality. This is a Complete upper assembled around a Faxon Match Series Gunner-profile barrel, a purpose-built upper receiver with modified feed ramps, and tuned hardware to help you get to a clean, repeatable suppressed setup faster. FeaturesGunner Profile Barrel - lightweight yet rigid, excellent harmonics and velocity for long-range accuracyMatch Series 4150 CMV Nickel Teflon Extension - sub-MOA capable, smooth feeding, corrosion-resistant1:7.5 Twist Rate - stabilizes popular 80- 108 gr 6MM ARC projectiles