The magazine release is classic HK, a single-piece, double-sided lever located at the rear of the trigger guard. HK's mag release placement is a departure from the competition, but it has its benefits. This placement keeps the mag release button off the grip to virtually eliminate unintentional mag drops. Note: If you're not used to this mag release placement, it will take a good amount of training for you to become comfortable and reflexive with it. After many hours of shooting, I still found myself searching for the release on the left side of the grip. Almost 20 years of training isn't going to be undone with a few hours on a new system. Additionally, I found the location of the magazine release difficult to reach without giving up my shooting grip and turning the gun in my hand. I consider myself to have normal-sized hands, so I wouldn't be surprised if the majority of shooters experience this same problem.
Running the Gun
While evaluating all of the features and controls of the VP9, I was cranking many, many rounds down range. I picked a couple different 9mm rounds for my testing portion of this review, including two lead-free frangible rounds currently in use on my agency's lead-free indoor range. The rest were a mix of 9mm ball ammo and duty grade or home defense rounds. In no particular order, they were: SIG Sauer Elite Performance 124-grain JHP, CCI Blazer 115-grain FMJ, Hornady Critical Defense 115-grain Flex Tip, Winchester Ranger 127-grain +P+ JHP T-Series, Fiocci 100-grain Sinterfire Frangible, and SinterFire Greenline 90-grain Frangible.
I started out with the two frangible rounds because I wanted to see if they'd cycle the gun reliably. I put about 200 rounds through the gun over the course of 45 minutes and, although the gun felt great in the hand, the frangible ammo just didn't cycle the gun reliably. After a handful of malfunctions, I concluded the pressures were simply too low to fully cycle the slide and I was getting a multitude of stovepipes or failures to eject. I blame the ammo, not the gun, as frangible ammo is known for being the underpowered root of many a malfunction. I packed up and moved outside to get some real rounds under the VP9's belt.
Beginning with the CCI Blazer, I started running the gun hard to see how it would hold up under a high round count and to get in as many manipulation repetitions as possible. After another 200 rounds, the VP9 didn't skip a beat and, although it did get a little hotter than other guns I've shot, it performed admirably.