AR-15 Olympic Arms K4B Rifle - 5.56/223
An AR-15 model with a 20" barrel and A2 buttstock.
• Forged A2 upper with fully adjustable rear sight
• Elevation adjustable post front sight with bayonet lug
• Fiberite rifle length handguard
• 20” barrel, button rifled, 4140 Chromemoly steel
• Long-life non-chromed bore
• 1x9 twist rate
• A2 flash suppressor muzzle
• A2 style stock with trapdoor
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