I have a Bushmaster SuperLight 16" M4 Profile Barrel that I would like to trade for a stainless steel barrel that's 5.56 chambered. My barrel is in great condition and yours should be too. It was properly broken in and only has about 500 rounds through it. It's Chrome Lined for easy cleaning and durability. It is also threaded 1/2" x 28 tpi. and chambered in 5.56/.223. I would prefer that yours be threaded also.