I have a RIA Tactical G10 10mm, and while it is a very nice gun, it is the only 1911 that I have that is unreliable. I broke-in the gun with factory ammo (180 grain FMJ from both Armscor and Sig Elite Performance), and from the get go, it began to experience FTF, FTE, and Failure-to-Lock Slide back after last round. Therefore, I sent it back to Armscor (customer service was great!), and the gun was returned to me in about 3 weeks. Armscor replaced the sear spring, main spring (25 lb.), recoil spring (20 lb.), and tuned the extractor and slide stop. But unfortunately, when I test fired it at the range yesterday, it was no better: stovepipes, FTF, FTE, Failure-to-Lock slide. I even tried a Tripp Research Cobra mag--it did not help. I can either send it back again to Armscor or have it replaced using the Davidson's Guarantee. What would you do?