Kit Up! posted a video of an AR-15 test. A Std M4 style AR with traditional charging handle vs the new Adcor piston AR with a proprietary forward charging handle. Not surprisingly, the forward charging handle is faster. When Dave Cloyed shot the ADCOR, he mistakenly reverted to his normal M4 operating procedure. He moved his face off the rifle to clear the malfunction. However he adapted and kept his face on the gun for the subsequent malfunctions. The ADCOR upper receiver sells for $1495 MSRP. Check out ADCOR Defense for more info.