Just got this back from SRI (Stalking Rhino Industries). Outstanding work. They jailbroke my Viper 45 and put a titanium endcap on it for me, as well as anodized the baffles, and made a spanner tool for me to unscrew the cap with. Matt over there is the best, outstanding communication, and a great guy to talk to. I would recommend SRI to anyone with a sealed pistol caliber can who wants to be able to take it apart and clean it. It takes a while to get your can back since they do the work in batches, but its well worth the wait. That shouldn't really bother anyone into NFA stuff anyway. Awesome company, awesome service.