Sig p226 15 round mags "Made in USA" ?

[drift_g35]

I just picked up a used p226 combat tb. It has a born date of 12/21/2011. It doesnt look like it has ever been shot. I took it out yesterday and one magazine is failling to lock the slide back and sometimes it looks like the spring is not pushing the rounds up (Dont know the technical term). I also had a problem getting the 15th round in and had to slam the mag against my hand to get it to go in. I took a closer look and both magazines have "Made in USA" on them. Are these crap mags that were swapped out with the gun before I bought it? Are they Checkmate or Promag? I know Mecgar are Italian (I think).

Any Ideas?

Thanks everyone.

[JM Ver. 2.0]

Mec Gar is Italy. Sig mags are all made by Mec Gar. You got some shitty mags.

[hammer03]

Recently some Sigs have come with Checkmate mags. They have not been reported to be very reliable. The Mec-Gars are stamped made in Italy, and are great.

[drift_g35]

Yeah I thought newer ones were from Checkmate from the factory. Cool Ill pick up some Mec-Gars asap.