The CRT-AR is a comprehensive carbon removal tool for both the AR-15 and AR-10. Magna-Matic Defense says with its multiple tips it can clean the bolt, bolt carrier, bolt carrier rear, and firing pin of both rifle platforms.
The company says its engineered "dead-stop" reamer design fits into the bolt carrier front and rear to remove the carbon from deep dead-end holes without cutting metal. The adjustable arm of the CRT-AR is designed to function like a small hand-held lathe to clean any bolt tail radius. According to Magna-Matic, this distinctive design which can accommodate the wide range of different bolt tail radii sets the CRT-AR far apart from other companies' form tools.