I have changed out the butt stock (Magpul Fixed Carbine), and pistol grip (TAPCO AR SAW) on my little 20ga VR82. I have also added a Sightmark holographic sight. I received my (4) FREE mags, after almost 6 weeks, only to discover that I had been sent (4) VR80 12ga mags. Advanced Tactical was quick to send a prepaid return label. So I wait, again ...