The GP Mod 7 suppressors were designed to provide the customer with a lightweight, durable, and affordable suppressor for general use. Constructed entirely of 17-4 stainless steel and utilizing the patented ECO-FLOW baffle technology, GP suppressors are both durable and high performance. Front and rear 3/4" (or 19mm) wrench flats provide options for traditional use or forend rail integrated applications. GP suppressors come pre-drilled with a .125" hole for pinning to create "one stamp guns". The GP7 can be pinned on a barrel as short as 9.5" The GP7 is a .30 caliber aperture silencer rated for use up to and including .300 Remington Ultra Magnum. The GP series provides quality, engineering, construction, versatility, and affordability in one. Brand: Griffin Armament Category: Suppressors Series: Direct Thread Suppressor Model: GP7 Caliber: 7.62mm Color: Black Cerakote Material: Stainless Steel NRR: 31 dB Length: 7.23" Diameter: 1.50" Thread Pattern: 5/8"x24 Weight: 13.20 oz