For what it's worth, I was a armorer for a 80 man police department for 20 years. We used Break Free Free for as long a I remember. Used it on all the weapons from duty sidearms (Colt 1911 and Glocks) to the SWAT guys full auto HK's. Never had a problem. I guess I'm in a rut but that's all I use now that I'm retired . My 2 cents worth.