Hi I'm Richard i have a Spikes Tactical ar-9 8.5-in with 4 32 round colt style mags I shot 150 rounds through it not one hiccup it is very accurate I don't know much about ARS I'm not sure if it's a build or all Spikes Tactical Spikes Tactical is the only markings I see minus the ones on the guard if interested contact me call or text 210-913 -1518 in trades im into 1911's, 2011's, shadow systems comp revolvers but feel free to offer other fire arms or cash thank you