M11-A1 Trusted by Elite military personnel. Upgraded for you. Issued to US Naval Aviation and key units in every branch of the Armed Services, the M11 is proud to serve. Upgraded with a stainless steel slide, a short reset trigger and two 15 round flush fit magazines, the M11-A1 variant features the same phosphate coated internals, Siglite night sights and Mil-Std UID label of the standard-issue M11.