My STI M1911A1 Tactical Single-Stack .45 ACP is not only a ragged-hole tack-driver, it is also dead-nuts reliable. Tolerances are tighter than average, but it functions 100% for 100's of rounds between cleanings.
As others have mentioned, both the HK45 and the FN FNX .45 Tactical are superb .45 ACP Single/Double-Action fighting pistols as well. Both of mine are quite accurate, although not quite as surgical as the STI. They are both 100% reliable for me despite routinely going 500(+) rounds between cleanings.
Any of the above are outstanding choices where reliability is paramount. You have to be careful when it comes to trusting an M1911A1 however. If it is a known, quality brand and build, then any higher-end M1911A1 ought to be reliable. Stay far away from "custom" M1911A1s that have been assembled or otherwise "worked on" by Armourers of unknown skill using parts of questionable quality. In that case, you are far better off to stick with a quality, factory .45 ACP pistol such as the FN FNX .45, SIG P220, HK .45, or HK USP .45. The factory M1911A1s from Colt, SIG, Remington and other quality manufacturers also ought to be reliable once broken-in (approx 500 rounds). Reliability in all M1911A1s is subject to validation through rigorous testing.
As others have mentioned, both the HK45 and the FN FNX .45 Tactical are superb .45 ACP Single/Double-Action fighting pistols as well. Both of mine are quite accurate, although not quite as surgical as the STI. They are both 100% reliable for me despite routinely going 500(+) rounds between cleanings.
Any of the above are outstanding choices where reliability is paramount. You have to be careful when it comes to trusting an M1911A1 however. If it is a known, quality brand and build, then any higher-end M1911A1 ought to be reliable. Stay far away from "custom" M1911A1s that have been assembled or otherwise "worked on" by Armourers of unknown skill using parts of questionable quality. In that case, you are far better off to stick with a quality, factory .45 ACP pistol such as the FN FNX .45, SIG P220, HK .45, or HK USP .45. The factory M1911A1s from Colt, SIG, Remington and other quality manufacturers also ought to be reliable once broken-in (approx 500 rounds). Reliability in all M1911A1s is subject to validation through rigorous testing.


















































