I own one of these shotguns. The layout and operating controls are indeed similar to the AR-15, with the exception of a bolt mounted operating handle on the right side, but the internal mechanics and operating system are more akin to to a Remington 1100 semi auto shotgun than an AR-15. I have two 10 round mags and two 5 round mags and the thing is as smooth as butter and really puts pellets down range FAST!!
Sweet piece of hardware.