HK SL 6 partially converted to G36 by Homeland Defense. This gun has over $3,000 into it, and takes G36 mags. Please see the attached pictures and invoice. I have fired about two mags through the gun and sometimes the trigger sticks in the fire condition. I haven't taken the time to look into the problem. I would like to trade for high end AR-10 and/or the like. I would sell for $2,000.