The YHM-15 is Yankee Hill Machine's core AR-15 offering, built in the USA with a mil-spec bolt carrier group and YHM's proprietary flip-up sights and free-float handguard options. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2005, USA Weight: 62 oz Overall length: 32.5" Status: Active Intended use: Tactical, Home Defense