Yankee Hill Machine Company 30Cal SRX Muzzle Brake Features The Yankee Hill Machine 30Cal SRX Muzzle Brake is engineered as part of the sRx system using an internal taper seal in front of the 1/2x28 threads to lock a suppressor on with a consistent repeatable mount. Because the taper forms its seal ahead of the threads gas and carbon fouling never build up on the threaded section keeping removal smooth even after heavy use. At 1.6875 inches in length and 0.75 inches in diameter this brake adds very little length or weight to a .30 caliber or 7.62mm barrel. Constructed from 4140 steel and finished in a durable black phosphate coating it is built to withstand sustained firing and rough field conditions. This short SRX brake must be paired with the YHM sRx Adapter to complete the quick-detach suppressor mounting interface which attaches to the industry-standard 1-3/8 inch by 24 thread HUB. Because the design has no moving parts there is no need to shim or time the brake to the barrel simplifying installation for armorers and home builders alike. The low-profile lightweight construction makes this an attractive option for shooters who want the aesthetics and ease of use of a dedicated quick-detach system without adding bulk to their build. Shooters running suppressed .30 caliber rifles will appreciate the reliable repeatable mounting this brake provides. Yankee Hill Machine Company 30Cal SRX Muzzle Brake Specifications Manufacturer: Yankee Hill Machine Company Model: 30Cal SRX Muzzle Brake Series: SRX Series Caliber: .30 Caliber / 7.62mm Color: Black Material: 4140 Steel Thread Pattern: 1/2x28 Length: 1.6875 Diameter: 0.75 Weight: 0.15 lbs Available At: GrabAGun