Yes it is...I have been an AR-180 fan from the beginning. I have had several... I got rid of my Costa Mesa because they were known to break hammers, and since the hammer is a stamped part on a 180; it's a very difficult part to replace. The Costa Mesa's and Howa's are rare enough that I feel a little guilty hammering 500 rounds through them at a range session. The one in the photo is a Sterling, and that is an original Armalite scope. I chose the Sterling because Sterling didn't have any parts breakage issues, and since the Sterling is the most common of the 3 makers; I don't feel bad about shooting the crap out of it. My youngest son is in love with the AR-180... He can field strip, and reassemble in under one minute. So what are the issues with the AR-180... The military tested the AR-18 pretty extensively and they helped Armalite work out some of the issues. Most of the issues were just materials and manufacturing techniques; the design itself was pretty darned sound. The civilian AR-180 really doesn’t have any significant issues. The stock hinge isn’t real stout and would never survive military service, but for a civilian, it’s no problem at all. Magazines are rare and expensive; I have a few original magazines and they work perfectly. For my range sessions, I have about a dozen PMAG’s that have been modified to work in the 180 and they work perfectly. PMAG’s are the easiest magazines to modify for a 180. The over-insertion stop needs to be cut off, a new magazine catch needs to be cut on the other side of the magazine, and the back of the follower has to be cut down by about 4mm to accommodate the 180’s last round hold open. Issues with the AR-18 The biggest issue the AR-18 (select fire version) had was bolt bound in full auto. The AR-18 really has no system to prevent bolt bounce, and it causes malfunctions on a rare occasion. Since the US military wasn’t really all that interested in the AR-18 Armalite chose not to address the issue. It happened rare enough that Armalite didn’t consider it a significant issue, while the Army did. So Armalite didn’t do anything about it…I will admit, of the full-auto AR-18’s I have fired, I have never personally encountered a bolt bounce malfunction (or any other kind of malfunction for that matter).