So i took my brand new Glock 21 to the range about a week ago. Everything went off without a hitch. Put about 200 rounds through it. When i got home, i field stripped it and performed the propper(recommended) cleaning and lubrication. I decided yesterday to "shine" my barrel, and remove the blueing. when i was finished, i cleaned and lubricated the weapon and went to put the magazine back in. after putting the magazine in i pulled the slide to put one in the chamber, and it stuck about a .25 of an inch away from being all the way forward. i lightly touched the slide and it pushed to the correct placement. i removed the magazine, and cleared the chamber and went to do the same steps again. this time with only 9 rds in the magazine. it did it again. i field stripped and made sure all the springs were in the correct position etc and then everything seemed to be working well. should i be concerned or was it a fluke?