I've already read:
I own a Full-size ("Regular"), a Tactical and a Match. I use the Regular as my main weapon for CQB and sidearm for outdoors.The Tactical and Match are primarily for collection. I've in total 8 mags, 4 Regular, three Match, one Tactical. I use 4 Regular mags and one Match mag routinely. The other three are still boxed.
Towards the end of 2012, I was troubled by the slide of the Regular not locking back after the last round was fired with all the 5 mags I regularly use ("worn mags").
I tried to fire an "out of the box" Match mag with one round loaded, the slide locked back okay.
Cupping the bottom of a worn mag would also result in the slide locking back after shooting the last round. However, having to push against the bottom of the mag is not natural. I've noticed free-play with the worn mags as well.
I tried firing a worn mag with the Tactical with one round loaded and resulted in the slide not locking back, as experienced with the Regular.
The experimental evidence pointed towards that the problem is vested with the mag and not with my Regular USP. Judging from the free-play, either one or both the mag-catch in the gun and the latching surface of the worn mags have been worn down. As a result, there is inadequate sealing between the rubber gas exit port of the mag and the gas input port of the loading nozzle
I tried soaking for one week the rubber gas exit port of one of the worn mags in #20 pure silicon oil for remote control cars shock absorbers. That didn't not swell up the rubber to provide a better seal.
With the large gas reservoir, the NS2 USP mags worked great and provided stable propulsion until the above problem surfaced.
Anyone has any solution to this problem?
Edited by email@example.com, 24 April 2013 - 08:53 AM.