Olympic Arms’ Plinker Plus Compact features a forged A1 upper with windage only adjustment. The front sight has an elevation adjustable post with bayonet lug, and the carbine-length handguard is made of Fiberite. The 16″ barrel is button-rifled 4140 chromemoly steel with long-life, non-chromed bore. It also features a 1×9 twist and is topped off with an A2 flash suppressor. The upper and lower receivers are 7075 T6 Aluminum forgings which are machined by Olympic Arms in their machine shop.