Panzer arms ar57 - AR57 ULT 12in Barrel 5.7x28mm Upper Receiver Assembly

Bought one 2 yrs ago from another site for around $650 woth one mag. Got the pistol version with the 12 in barrel. It's a blast to shoot just switched it over to a Franklin Armory bianery lower and ot works great. Just pucked up a sparrow. 22 suppressor for ot but haven't us3d it yet. The P90 mags can be a little tough to load from time to time. Another thing I recommend is to trim the top off a 5.56 mag and use it as a.brass catcher. If they come out with a shorter barrel I ill buy it. IF you like 5.7and have the money I would recommend it but watch for a sale