I wrote up my experience with renegade's saiga AR .223 adapter a few weeks ago, but it was tainted with some of my stupidity. So, in the last 2 days, I've put a few rounds through it and wanted to give my impression.
First, let me say, when you buy an adapter from Renegadebuck, there's 3 things to remember.
1) You get excellent support from a really nice guy who's there to help you all the way.
2) Don't get impatient like I did and try and "Anticipate" the modifications you need to do to your gun, and try and and do them prior to getting the adapter. Wait until you have the adapter in hand. The minor modifications will go so much smoother. (This was my stupidity I mentioned earlier).
3) Renegade gives great instructions. Follow them, and it will be smooth sailing. Whether you mill it or use a dremel, which is what I used, it will go great.
Anyway, Renegadebuck is sending me a small replacement piece to fix a SNAFU that I created. But in the meantime, I did a temporary fix. Having said all that, there isn't much I can say except: The adapter is a breeze to install (If you're patient and follow instructions), and it works "Most Excellent" (In the words of Bill and Ted). Today, I loaded up 15 "Different" AR-15 30 round magazines that I have on hand. I loaded no less than 20, and up to 30 rounds in each magazine. I shot approximately 350 rounds through my Saiga. I did not have 1 malfunction out of any of the magazines. I shot slow deliberate target shots, and I shot some rapid fire "damn this is fun" shots. All was good. Not one feeding or ejecting problem. All magazines stayed in the adapter firmly.
I shot Mostly Tula Russian 55 grain steel case FMJ ammo. But I also shot about 20 rounds of Herters 55 grain steel case Hollow Points, 40 rounds of Fiocchi 55 grain brass Pointed Soft Points, and 30 rounds of military 5.56 62 grain surplus ammo. No problems feeding whatsoever. (And that's actually surprising, because the saiga .223 is known to clog up in the chamber area after shooting a lot of steel case russian ammo). But I had no issues whatsoever.
And at 100 yards, with a reflex sight with no magnification, (Basically a red dot type sight), I put all my shots on target as I planned. So in a nutshell, I am extremely pleased. I am not writing this because of some ties I have with Renegadebuck. I've never even met him. Although, he makes you feel like you've been friends for years. Matter of fact, I bought the adapter used from another forum member who was changing out his configurations and didn't need the adapter any longer. So there is no conflict of interest here. But I must say however, that Renegadebuck is even going out of his way to replace the piece that I need, even though I didn't buy it directly from him. You can't ask for any better service. He's answered all my PM's and emails, and he's even talked me through figuring out how to fix my snafu.
Renegadebuck is gearing up to go back into production; according to his most recent post; and I just wanted to say that I could not have been any more pleased with his adapter. With the adapter in hand, start to finish, you can have the adapter mounted properly and have AR magazines fitted properly in less than an hour. Just remember to be patient and wait till you get the adapter in hand before doing any changes. A big thumbs up to Renegade buck and his adapter. Ohhh. P.S. I did also throw 20 rounds into one of my Saiga .223 magazines. I removed the adapter (2 seconds literally); put the Saiga magazine in; and it fired perfectly also for all 20 rounds. Put the Renegade adapter back in. (2 seconds literally) and fired the last magazine of 30; flawlessly. Anyway, thanks Renegade for a great product.