I got a Noveske KX3 a couple months ago. It has been test fired only, could pass for new. It has the flaming pig on the side. My latest barrel ended up with different threads, so I cant use it. It has standard AR-15 5.56 threads.
So I just want to trade the regular AR-15 threaded 1/2x28 KX3 for the the larger threaded model, 5/8x24 which is usually used on 6.8 or .308
Many dealers are sold out of the standard 1/2x28 units but have the other, [usually sold for 6.8 or 308] in stock.