LMT MLOK 10.5 inch Upper Receiver
Lewis Machine and Tool MLOK 10.5inch Monolithic Upper Receiver. These have Removable Barrels, You can switch out calibers and lengths very easily. There are a large variety of barrels to choose from. I can order you anything LMT makes at a Great Price, just ask. This one comes with all you see here in the pics. Add $220 for LMT factory flip up sights.