Interesting product, but I'm reminded of my first airsoft game, one of the more experienced players had his sidearm holstered, but I noticed he didn't have a magazine in it. I pointed it out and he said he normally doesn't have a magazine in because they can be lost in the hustle of an airsoft game. The rationale was you should always have your AEG with you and it should always be properly maintained, I've hardly ever found myself in any situation where I needed to use my GBB. The reality is when their main AEG goes down, most players will simply call themselves out, walk back to the staging area and pull out their backup AEG then return to the game.
Not me. I'm stubborn that way.
I WILL, however, suicide-rush encampments pistol-only and try to take as many with me as I can, on the way back towards the staging area.