It's a decent little knife. The blade did not touch the backspacer as there is no backspacer to touch (just standoffs and the blade doesn't touch these either). If I were to make the purchase again, I'd get a Camillus EDC instead though. The EDC is a better value.
I have hade two of the air rangers. It is a super knife for the money IMHO! The second generation models coming out are even nicer! There is no contact with the spacers and is is very tight. I have also had the EDC and think it is a great knife but a good bit higher priced. You can get the gerber for @ $35 here and the EDC normally runs considerably higher. Both are good knives though!