Firearms

Olympic Arms UM-1 Match 5.56 20-inch

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Specifications

About

Notable Variants

Aftermarket Ecosystem

Historically Significant Examples

Serial Number Data

Production data from factory records and collector research. Year ranges are approximate for pre-1968 firearms.

Years	Serial Range	Count	Factory	Country	Confidence

Match-grade Olympic Arms AR-15 with bull barrel.

Type: Rifle

Action: Semi-Automatic

Caliber: 5.56x45mm NATO

Capacity: 30

Year introduced: 1999, USA

Weight: 116 oz

Overall length: 38.5"

Status: Discontinued

Intended use: competition, precision