Weapon Files

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AR18 (AR180B)

Weapon: Armalite AR18/180

Caliber: 5.56x45 mm (.223 Remington M193)
Action: Gas operated, rotating bolt
Overall length: 940 mm (738 mm with folded stock)
Barrel length: 464 mm
Weight: 3.09 kg with empty 20 rounds magazine
Magazine capacity: 20, 30 or 40 rounds

The AR-180 is the rifle Sean Applegarth had in his scabbard when he arrived at Knockside. It is an accurate, reliable, semi-automatic weapon developed, as the semi or full-auto AR18, by the Armalite company in the early 1960s to compete against the AR-15/M16 and AK-47 rifles for military contracts.

The AR18 was a favourite of the IRA and known by them as ‘The Widowmaker’.