KSC HK USP Compact
By Redhawk

Stock Specifications
Features KeyLock function
Choice of baseplates
largest bored KSC piston
new hopup mech
sintered alloy parts
RRP 135UKP

HK USP Models The Heckler & Koch USP pistol was introduced in 1993 with the intention of incorporating all the various features which military and law enforcement agencies appeared to find vital. USP is an acronym for Universale Selbstlade Pistole or Universal Self-loading Pistol. It is a double action semi-automatic pistol with a frame-mounted safety that doubles as a decocking lever. The frame is made of polymer synthetic material and has mounting grooves for installing accessories such as tactical flashlights. It has a 4.25” barrel (4.41” for .45) and comes in three different calibers: 9mm Para, .45 ACP and .40 S&W.

In 1996 HK released the USP Compact, which is slightly shorter than its bigger brother the USP. The compact model has all the features of the larger USP and comes in all the same calibers, with the addition of .357 SIG. It has a 3.58” barrel (3.8” for .45) and is comparable in size to the compact Glock pistols.

Since then, several models also have been spawned from the original version. The P2000 is a variation of the USP Compact, while the USP Expert and USP Elite are competition-style models. Special tactical models such as the USP9SD, USP Tactical and MK23 SOCOM are made for law enforcement and military. These have extended threaded barrels allowing sound suppressors to be attached for special operations uses.

KSC USP Compact Stemming from the success and popularity of their MK23 SOCOM gas blowback pistol, KSC has released their latest variant of the HK USP series — the USP Compact. It is modeled after the 9mm, Variant 1 version.

Currently, the real USP Compact has 10 different variations! They range from single/double action with safety/decocker on left side (Variant 1), SA/DA safety/decocker on right side (Variant 2), SA/DA decocker only on left side (Variant 3), double action only “DAO” with no control lever (Variant 7), and so on.

The gun is packaged in a plain blue cardboard box with inside styrofoam protection. Along with it are a nice detailed manual (sealed inside a plastic bag), small bag of BBs, loading tools, hop-up tool, hammer-lock key (a safety feature) and barrel plug.

The magazine comes with an extended finger floorplate installed, but a standard flushed floorplate is also included. A very nice touch! Replacing the plate requires pushing in a small pin at the base and then sliding it out. This may take a bit of effort as the plate is installed pretty securely. I decided not to replace it as I find the extended plate adds a nice appearance to the whole gun.

According to KSC's manual, the airsoft model weighs 710g, meaning it is virtually the same weight as the genuine model (real USP Compact weighs about 730g). The magazine can accept 21 rounds, but loading tools are required because it doesn't allow drop-in feeding. The magazine is nicely constructed and is made of good sturdy metal. Both the extended and standard floorplates are of plastic.

On the back of the magazine are numbers with recessed circles (holes) next to them to imitate the cartridge count. The numbers only go up to 10, which doesn't make sense because the real USP Compact (9mm) can hold up to 13 rounds. However, in the U.S. the magazine capacity is only 10 rounds for civilians. This is interesting; maybe it's a replica of the U.S. civilian “post-ban” magazine or something. I don't know… just my own speculation, not fact

The gun itself is made of high-quality ABS plastic and has a matte-black finish. The surface of the slide and frame differs slightly; the slide is smooth while the frame has a very fine texture to it. The trademarks are all there (see photos), including those tiny symbols on the slide. One thing I couldn't find is the KSC logo that they sometimes put on their guns (in the most inconspicuous places). The only giveaway that this is an airsoft model is the tiny “JASG” on the right of the frame.

The grip is very comfortable to hold and has a rough stippled texture on each side. On the front and back there are square checkering for added secure grasp. I find the grip fits medium-sized hands very nicely, but larger hands may require the extended finger floorplate. External metal parts include the rear/front sights, hammer, trigger, slide release, safety and magazine release.

The bobbed hammer makes the gun more compact, which will not snag on clothing. The safety lever is on the frame and placed at just the right place. Using the thumb to manipulate the lever proved to be smooth and quite fast. The safety lever has the letters S (safe) and F (fire) engraved onto it, with S painted white and F painted red. Pushing the lever upwards places the gun on SAFE and lines up the S with the “white mark” painted on the frame (the mark is repeated on opposite side for left-handed levers). One thing I like is the paint is on a slightly recessed surface so that it will not wear off so easily. On the real Compact, you can choose models with the lever on the left or right side (for lefties).

When the hammer is cocked, pulling the safety lever downward decocks the hammer onto a “semi-cocked” position (slightly raised). The trigger has to be pulled in order to bring the hammer down to full rest (flushed with the slide). The gun can be placed on SAFE with either the hammer rested or cocked (for “cocked and locked” carry).

The trigger is slightly grooved and is very smooth in both single and double action. The trigger guard is flared recurved with serration for a solid hold by the weak hand index finger. At the front of the frame are universal mounting grooves (rails) for installing accessories. There's also a lanyard-type loop at the base of the grip. The magazine release is ambidextrous and can be activated by pushing it down. The release is placed more forward ahead of the grip. I had to reposition my grasp in order to reach for it with my thumb. However, a better way is to bend my trigger finger back to touch the release. I use this same method for my Walther P99. Inserting the magazine gives a solid “click” and it is held solidly in place without any “rattle.”

Just inside the magazine well is a special patented safety feature that HK had developed (and nicely replicated by KSC). HK calls it the Lock-Out Safety Device and it is designed as a built-in gun lock. There's a small dial inside the mag well that you turn 90-degrees clockwise with the key to prevent the gun from firing. The dial has two holes and the key has two short prongs; so to lock the gun insert the prongs into the holes and turn. With the dial rotated, the trigger can be pulled one-third way only. To unlock it, simply reverse the procedure. Anyone not familiar with the pistol will not be able to figure out how to unlock it.

There is a faint seam down the center of the frame, though most of it is interrupted by the serrations, checkering and letter markings on the frame. I'm not too concerned because it's minor. KSC makes it up by adding very nice details to the gun. One is the imitation loaded chamber indicator on the extractor. On the extractor there's a red mark on it to indicate that the chamber is loaded (it's just a detail and not a functional feature on the airsoft model). Also, the inner walls of the outer barrel have the imitation polygonal rifling grooves that are copied from the genuine model.

The fixed rear and front sights utilize the 3-dot system for quick target acquisition. The white dots are not painted on, rather they are plastic inserts that go into pre-cut holes. The dot on the front sight is the same size as the ones on the rear, so when lining them up the center dot appears slightly smaller. This is not a distraction at all as the white dots can be seen clearly and brought up quickly.

Performance For the chronograph test I used HFC134a gas and 0.2g BBs. I fired the gun in normal room temperature and I also warmed up the magazine. Accuracy test was done using a standard 6-inch bulls eye target at 16 feet away.

Injecting gas into the magazine is no different than any other GBB made by KSC. The loading tools consist of a rod, a metal tube and the tube connector base. The magazine doesn't have the “exposed” follower that can be pulled down for loading. The mag holds 21 shots and are stacked in staggered formation. But I find that if all 21 BBs are loaded the mag will not fit into the gun that well because the spring is forced to maximum compression.

First the velocity. I fired the entire magazine and calculated an average of 234 FPS, with a high of 249. Not very impressive at all from a good-sized GBB like this. I had expected around 250, but at least the blowback was good. However, it has very good gas efficiency. I was able to fire 93 good shots from one charge.

I fired 10 shots into the target and got some pretty decent groupings (see target photo). Six of the 10 shots landed inside the inner 3-inch ring. The blowback was sharp and quick and the slide locked back after every last round. The sound consisted of a quick “puck” of average decibel from a GBB discharge. It wasn't too loud; I have other GBB pistols that are louder. The accuracy is no better than other GBB pistols that I have, including ones from WA, Marui, Maruzen, Marushin and other KSC guns. I noticed the shots tend to land to the right. I have other smaller guns (with shorter barrels) that are more accurate than the USP Compact (WA Spy Pack is one example).

The hop up is located at the inner barrel, right where the BBs are loaded in. The tool is metal and has raised notches around the area that connects with the rubber ring on the barrel. Turning it clockwise increases the hop.

To disassemble the gun, first release the magazine and then push the slide back slightly so the slide catch lines up with the pivot point of the slide release lever. Now on the right side push the lever out and remove it. The whole slide will run forward and off the frame. The outer/inner barrel, guide rod and spring can then be removed from the slide as well.

Conclusion This is a very nice and clean GBB pistol from KSC. The details and functions are all copied to near perfection. The blowback is great, but the power could use some boosting. Overall, this is one of KSC's finest and is certainly worth the money.

Just an interesting observation: The styrofoam mold that protects the gun is larger than the gun itself and it looks suspiciously that a full-sized USP would fit nicely into the mold. I know the mold is made specifically for the USP Compact (not some other gun) because there're recessed areas for the safety and slide release levers. There is even space reserved for a full USP hammer and the area that fits around the trigger guard is larger (full USP trigger guard is larger than that on the Compact). Maybe it's just my wishful thinking, or maybe a full-sized USP is in development! Who knows?

Pros

  • Exceptional quality and details
  • Clean and sharp blowback
  • Very good gas efficiency

Cons

  • Below average velocity

By Redhawk

External Links: KSC

Site links: TBA

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Last modified: Friday, January 23, 2004 5:52 PM Copyright 2003 ArniesAirsoft