I have fired quite a few AR-15 rifles, including both direct impingement and piston driven. Performance has varied, but all piston guns were more expensive than the standard direct-impingement AR-15.
A malfunction is a stoppage in the cycle of operations. This stoppage can take many different paths, and we codify each one and break them into two broad categories: those that can be reduced with Immediate Action and those requiring Remedial Action.
After my house was destroyed by a fire on 10 April 2005, Kevin McClung of Mad Dog Knives helped me clean up my firearms so I could read the serial numbers and report them as lost to the BATF. Firemen had unceremoniously dumped them all into a pile in my backyard. Kevin and I put them in a 55-gallon barrel to take them to his shop so we could run a cutting torch through the receivers.
What if you could have a shotgun built from the ground up as a fighting shotgun, shorter than most while weighing within a few ounces, and with a total capacity of 17 shells? The SRM Arms 1216 makes this a reality.