Sig 556xi Russian 7.62x39mm
Dec 15, 2015 - Sig Sauer 556xi Russian SWAT model (aluminum fore-end) in 7.62x39mm. (The one that takes AK magazines.)
I had wanted a Sig 556R for a long time (the previous model) and when the xi came out I decided to put one on my want list. I debated for a long time about getting one due to the problems reported by many people in forums and on You Tube. In the end, I had talked to many users who hadn't had any issues and decided to try my luck. I've had to send two pistols back to Sig and they fixed them right up, so I figured the worst case would be me sending this in and getting back working in a few weeks.
When the rifle came in I pulled it right out of the box and pumped 140 rounds downrange from various magazines. (My local store is also a range - Point Blank Range in Mooresville, NC) It had quite a few failures to eject and it short stroked a bunch of times.
This video is after I took it home and thoroughly cleaned and greased it. Granted, it's only 40 rounds, but the first 40 rounds had probably 5 malfunctions, so this was great.