RIFLE: ABC RIFLE COMPANY MODEL ABC-15 RIFLE, SERIAL NUMBER 77-15634, BLUE / CCH, YES - INCLUDES ORIGINAL BOX AND PAPERS, SEMI - AUTOMATIC, 5.56 NATO, 16" Notes: ABC RIFLE COMPANY ABC-15 RIFLE Pattern: AR-15 style, using the familiar AR-15 operating layout. Calibers: The ABC-15 has been documented in 5.56 NATO, 7.62x39 mm, and .300 Blackout configurations. Maryland's 2026 roster lists the ABC-15 pistol in all three. Typical configuration: One documented rifle had a 16-inch barrel, 12-inch quad rail, M4-style stock, A2-style grip, and mil-spec controls. Construction: ABC-15 lower receivers have been advertised with 7075-T6 forged aluminum receivers and a hard-coat anodized finish. Quality/reputation: Reports from owners are mixed, but some describe reliable long-term operation after an initial issue, while others criticize the use of budget components. These are anecdotal reports rather than controlled testing. Regulatory records: A 2025 federal forfeiture notice specifically identifies an ABC Rifle Company ABC-15 as a multi-caliber rifle.