EAA Check-Mate Witness 2311 Magazine 9mm 20 rdEAA Check Mate Witness 2311 Magazine 9mm 20 rd Designed for 2011 pistols chambered in 9mm; 20 round capacity for extended use; Constructed from high quality American milled stainless steel; Polished inside and out to reduce drag and ensure smooth operation; Self lubricating polymer follower for consistent feeding; High performance springs for exceptional reliability and endurance; Durable construction for competition, range use, or personal defense;