I wouldn't fiddle with a 9mm AR that isn't the Colt pattern. You'll always be able to get parts for a colt pattern gun.
I have shot mine at steel out to 200 yards. Did fine with open sights. It's the only part I kept from my 9mm AR when I parted it out. Sitting in the safe waiting to be used again one day. Or auctioned off to the highest bidder I suppose.
I'm new to the pistol ar build so excuse my ignorance when I ask what does a "colt pattern" mean? I know for .223/5.56 builds everything is pretty much interchangeable. I have a cmmg dedicated 9mm lower...,will the tros work on that? And the 3 lug barrel....is that better than just a threaded barrel?