RIFLE: MOSSBERG MODEL MMR, SERIAL NUMBER 21486A, BLACK (MATTE), CASE NOT INCLUDED, 20, 5.56 NATO, SEMI - AUTOMATIC Notes: The Mossberg MMR is a semi-automatic sporting rifle designed around the AR-15 platform. Featuring a durable construction, ergonomic design, and familiar controls, the MMR offers versatility for recreational shooting and general sporting use. Its modern styling and practical design make it a recognizable option for shooters interested in the AR-platform rifle