I picked up a Shield and love the beauty. However, while trying to field strip it, I couldn't get the slide lock to engage (this is not a thread on releasing the slide, because I use the slingshot method). It seemed like the slide wasn't moving back far enough to engage the lock. After numerous attempts it was able to be pulled back far enough and engage and field strip. After examination it appears that the RSA spring might have been the issue. Is this something, that has happened to Shield owners before? Should I try and get another RSA or will it break-in over time?
P.S. I did a search but many say it breaks in over time, but that doesn't really sit right since it will be my primary carry gun.