Manufacturer's website: Blackhawk Price range: Approximately $24-56 *Update* - I just learned some new info. BHI's Sportster concealment SERPA holster is actually constructed out of a polymer material and can be distinguished from the composite versions as it is a lighter gray color. These are the cheaper models around $29, however they are still ridiculously durable. All other BHI CQC SERPA holsters are constructed out of a carbon fiber composite material which is considerably stronger. The G19 holster pictured here is a polymer Sportster unit, and the P220 holster is the composite model just in case anyone wants to know. To start off with, I'll clarify things a bit as Blackhawk's SERPA lineup offers a large number of options. This review is primarily focused on the Blackhawk level 2 retention holsters. Blackhawk has 3 different retention levels available. To summarize these I'll mention the basics. Level 1 features a passive retention device which consists of a spring loaded mechanism running the length of the underside of the barrel as well as the front of the trigger guard (I'll go more into this later). Level 2 features a push button on the side which has an internal notch that blocks the trigger guard and prevents removal. Level 3 consists of a spring loaded cap which snaps in place, covers the rear of the slide, and flips out of the way by using a thumb brake mechanism similar to other holsters. I do not have a level 3 holster and have not yet used one so I'm only going to focus on the first two levels. Just so there is no confusion, all Blackhawk level 2 holsters also have the level 1 passive retention device. To get the ball rolling we'll start off with a picture of the inside of a level 2 holster so that hopefully it will make a bit more sense: Okay, what we have is three things here: -#1 is the Level 1 passive retention device. If you look on the lower portion of this device (in the trigger guard area of the holster), you can see the additional spring loaded tab which provides some forward force on the front of the trigger guard. -#2 is the upper back of the Level 2 retention button. -#3 is the lower notch on the back of the Level 2 retention button. The front of this notch is beveled and locks in place on the inside of the trigger guard once the gun is inserted. Here's an external view (with Airsoft KWA Glock 19): -#4 in this picture is the Level 2 SERPA button for disengaging the trigger guard locking mechanism. The button is one piece which has a notch on the lower inside portion that blocks the trigger guard and prevents removal of the gun unless pressed inward (which pulls the notch outward). I don't have any specs on just how much force would be required to yank the gun out without pressing this button. It would certainly require a ridiculous amount of force seeing as the holster is mainly composed of either a carbon fiber composite or tough polymer material. I attempted to yank my P220 out of my SERPA with a significant amount of force while leveraging the holster in between my feet and the thing just would not budge, so it is definitely a rock solid retention device. The gun was double checked unloaded of course, mag removed, slide locked back as I'm a stickler for safety. Simply put, once locked in place you will never have to worry about your handgun accidentally falling out. I was skeptical at first however this is truly a nice feature and well placed for a natural draw stroke, not to mention very light to press which I will elaborate on later. -#5 is an adjustable screw which adjusts the tension of the Level 1 passive retention system. This system is comprised of a long spring loaded mechanism that runs the length of the inside bottom of the holster (right under the barrel of the gun) and provides tension to the underside of the barrel/frame as well as a small piece that also provides some spring loaded tension on the front of the trigger guard. The whole point of the section that pushes on the front of the trigger guard is that when you begin removing the gun from the holster, this spring loaded piece gives you a little bit of help by pushing outward on the trigger guard. It's not much force and really isn't noticeable, however in theory it should help even if by only a small degree. The adjustable screw for this level 1 device allows you to adjust how much tension this device exerts on the barrel of the gun. The nice thing about this is it allows you to adjust it so that the gun is just a slight amount loose and inserts or pulls out smooth as butter. On the other end of the spectrum, if you prefer a slight amount of drag on the gun so that it fits rock solid in the holster with no wobble, you can adjust for that as well. After playing around with the adjustments on my two different SERPA's, I can say the level 1 adjustment is definitely noticeable and a worthwhile feature for customizing to everyone's individual tastes. There is a substantial difference in adjustment between both extreme ends of adjustment, however it is entirely possible to over-tighten it. I would recommend against tightening it too much as it is entirely possible to cause too much drag on the firearm making it much too tough to remove in a realistic manner. This next picture shows two of the many mounting platforms available for Blackhawk's SERPA lineup: The mounting platform on the left is Blackhawk's Sportster concealment platform, which is designed for a more ergonomic fit. The platform on the right is their standard belt loop platform which provides a bit less adjustability though is less bulky in design. The Sportster concealment platform can be used as a regular belt platform obviously, and in my opinion is considerably more comfortable to the point where the standard belt loop platform is a bit pointless I think. It's really just a matter of personal preference. -#6 are 2 adjustable hooks which provide retention on the underside of whatever belt the rig is attached to. This section offers 4 available adjustments to adjust for belts sized from 1-2 inches which should cover pretty much any belt anyone would be using. Each position makes an approximate 1/4 inch adjustment. These hooks provide an absolutely ROCK solid belt retention. While wearing one with my P220 (quadruple checked unloaded of course), I tried violently jerking on the grip of the gun as well as the holster though it barely budged. Once in place on your belt, this thing is not going anywhere, PERIOD! I have seen lots of people complain over the year of various brands of in waistband holsters and others of similar designs that hook in like this (such as Fobus holsters), and many people have had problems with their various brand holsters pulling out still attached to the gun on the draw stroke. With the BHI CQC's, it's simply not gonna happen in my experience, so one less thing to worry about. -#7 is an additional hook which allows you to wear the holster with the outside section inside your waistband. Wearing the holster in this manner would have this hook providing retention on the inside of your pants as well as both hooks from #6 providing some retention on the outside as well. Worn in this mode, the hooks still provide excellent grip on clothing and make it pretty much impossible for the holster to remove with the weapon, so it is still a very stable method to use unlike some in waistband designs (Fobus, or so I've heard). -#8 is simply the concave outer pad of the holster which provides a more ergonomic and comfortable fit as well as an additional mounting option as described above. -#9 are simply limiting devices similar to those in #6 (these do not have hooks) to provide adjustments for holsters between 1-2 inches. These are not notched however, and they provide a free range of adjustment.