Back in July I purchased a Colt 1903 Model M .32 cal. replacement magazine that was packaged as Colt Genuine Factory Parts manufactured by International Armament Corp./ new production from a vendor at Camp Perry, Port Clinton, Ohio. About the same time I order a 1903 Model M .32 cal. magazine from U.S. Armament, just found time to take them to the range for a test run. A few days I took my 1919 Model M to the range with these replacement magazines and an original Colt magazine. After 100 rounds (50 Prvi Partizan's 71 grain FMJ and 50 Winchester's 71 grain full metal) all three magazines ran like a champ. This short test run with reproduction magazines for my 1903 Model M was more successful that my search for a replacement (reproduction) magazine for my Colt 1908 Model N .25 cal. I tested a Triple K model N .25 cal. magazine and it fail terribly, it's wouldn't feed the first round and I tried it with different ammunition with the same results. Looks like I with stay with original magazines for my Model N, I need to do more testing on the model M replacement magazines, but so far I will purchase more of them.