Geissele Automatics Super Duty 5.56 NATO 16" - AR-15 Rifle Geissele Automatics Super Duty 5.56 NATO 16″ – AR-15 Rifle
$2,375.00Mil-spec is where the Geissele Automatics Super Duty 5.56 NATO 16″ starts, not where it stops. Chambered in 5.56 NATO and built with components selected for performance rather than cost, this is an AR-15 that earns its price.