DealFree shipping on all orders, quantity discounts available for some products. The Ares Armor Effin-A Compensator MKII for 5.56 is designed to allow users the ability to adjust the manner in which the gas exits from the weapon. The Effin-A Compensator MKII features 8 columns and 3 rows of exit ports. from Granite Ridge Outfitters (Product EFFIN-A MKII 5.56) |