Today I fired 100rds of Winchester 124gr FMJ NATO through the Stribog using the 20rd factory magazines. It ran 100% dumping the spent cases in to a nice small area at about my 3:00. The backup sights were spot on. I honestly don't understand why this gun does not get more attention. According to my take on the sec922(r) parts count thing, it has only 13 of the listed parts. If there is a way to get the factory folding stock, this should be easy to SBR with the replacement of only three US parts. Now I need to figure out what optic to put on it and see how my 9mm suppressor likes it.