The IOSSO NYFLEX Rifle Bore Brush is specifically engineered for .50 BMG caliber firearms providing superior bore cleaning performance with advanced synthetic bristle technology.IOSSO NYFLEX Rifle Bore Brush for .50 BMGNYFLEX synthetic bristles for effective cleaning without barrel damagePrecision-sized for .50 BMG bore diameterDurable construction for repeated useProfessional-grade cleaning toolEssential for maintaining accuracy and performance of .50 BMG rifles this specialized brush removes fouling and residue while protecting your barrel's integrity.