To further my vote for the Springfield I just now timed myself. From the moment I flipped the safety into the middle upright position and flipped down the magazine cutoff/bolt release switch to when I put it back together and re-inserted the bolt into the receiver and snapped the trigger on an empty chamber, 12 seconds transpired, which included pushing in the locking detent and unscrewing the striker from the bolt body and then screwing it back in. Bet I could get it down to 9-10 seconds if the Huns were on the verge of over running my trench.
