I bought one of the new Ruger PC Carbines, dropped the Glock magazine well into it, and had a great time with it at the range. Functioned well, and shot accurately ...
BUT, there were a couple of "issues." There is a barrel spacer in the takedown block ahead of the receiver, and on my specimen, every time I separate the barrel from the receiver (takedown) the barrel spacer would fall off. Not the way it should be. Also, even with the fore grip torqued down, there was still play in it--the front end of the grip could be pulled away from the barrel between 1/8 and 1/4 inch. Neither of these glitches kept the gun from functioning; they were just annoyances.
I went to Ruger's website and filled out their Online Support Request. 48 hours later I received an email saying they wanted to look at the gun and providing an RMA and pre-paid shipping label to return it.
I just got it back. They didn't tell me what they found wrong. What they did tell me was that they replaced the barrel and takedown block--basically the whole front end--function and safety tested it, test fired it, and promptly returned it. Everything feels tight and looks new ... and the barrel spacer stays in place as it should.
This isn't the first time I've been a "beta tester" for Ruger (I sent a first-run GP100 in .44 Special back, too), and one could argue that they shouldn't release things until they are totally right. But I continue to be a fan. A pistol-caliber carbine that accepts Glock magazines and a GP100 in .44 Special are both things I wanted Ruger to produce, and I couldn't be happier with the final products and the bullet-proof support.
Thanks, Ruger!