I love the AR-180B. Simply put. I own several, I shoot them all. Lots. Have put many thousands of rounds through each one. Everyone I lend them to on the range, in 3 gun, in service rifle, in the woods what have you enjoys them. ArmedSask's FAQ has been really helpful over the years and I've referred to it lots.
What I don't love, however, is the continuously drying up supply of spare parts. This has been pointed out on CGN before and it's very true. Fortunately I do have quite a few spare parts I sourced a long time ago when 180B upper parts were still fairly easy to come by.
The metal lowers are great. I bought 2. Rumors of new uppers are wonderful but what we really need as much as anything is a readily accessible supply of spare parts (cam pins, bolts, bolt carriers, firing pins, springs, pistons and such).
I have a full 180B with a broken lower that I bought locally for literally next to nothing. I'm debating buying a NoDAK lower to breathe new life into it or just keep it aside for spare parts as it was hardly used before it broke on the owner. It would be nice if I could make it a complete rifle and sell it but with a lack of spare parts anywhere until (if ever) a source in Canada becomes available I think it will just be a parts source.