I very much so like the idea of keeping things cleaner longer, I only wonder if this will hurt accuracy at all. I am going to do this to my 16" set up, but IM thinking of doing it to my 24" set up as well. It would be nice for it to stay almost spotless after a few mags. Does any one here have a piston AR-15 personally. Not just some one who knows a guy LOL or read some thing some where. IM looking for some one with real hands on experience that has went threw 100s of rounds not just a mag or two. I have seen one on a full auto lower and it ran good, but do u end up with an AR-15 looking AK, in terms of accuracy. The reason I ask is that its attached to the barrel and its more moving parts. For those who don't know this is not like the system used in the AK47/74, its closer to what is used in an SKS or true SVD not a PSL or romak. So this system has been tried and proven on some very useful rifles. DI systems were designed with accuracy in mind and it works, but its filthy.