Engineered to ensure maximum accuracy and consistency, the Grey Ghost Precision® Match Grade Threaded Barrel for Sig Sauer® P320 Compact Pistols is a drop-in handgun barrel featuring precision-machined 416R stainless steel with a corrosion-resistant black nitride finish. Machined to ultratight +/- 0.003" dimensions for consistent accuracy with a SAAMI-spec match chamber, this drop-in barrel upgrade boasts a 1:10 twist rate and 1/2x28 TPI threads. Includes knurled thread protector. Compatible with compact P320 pistols ONLY. Best used with brass-cased, factory-loaded ammunition.