Cody from United States, CO Public Profile

Although I'm sure this product functions appropriately as a muzzle device, the wrench grooves required to install and torque the device are too narrow to accommodate either an armorers wrench or a standard drive crowfoot wrench. Three separate armorers wrenches are too wide to fit the groove - including Brownells armorer's wrench. I'm further annoyed this information isn't available on their website. For a $160 muzzle device, I expected better. Machining the part to accommodate a typical wrench makes sense, and I'm disappointed Surefire was unable to implement that. Their SFA2-556 muzzle device (now apparently discontinued) did not have this problem. If Surefire insists on these types of "innovations" (oversites), I recommend they either field test their equipment, ship all of their muzzle devices with an appropriately sized wrench head, or include a complementary grinder. I'm rating this product a 1 out of 5 because an average (3) muzzle device can be easily installed with any old armorers wrench and it is a solid regression from a previously existing product.