I own both versions and got some of the first batches. I do to prefer shooting the aluminum one they both carry very well you can barely tell it’s there. I didn’t have any problems with the aluminum version I did have light strikes with the Polymer version which I sent back to Keltec and didn’t have any problems since with it. I like being able to turn the grip safety on and off. Plus Keltec has great customer service, they will take care of you if needed.