Heckler And Koch HK USP Tactical, USP Expert Operators Manual

31
Figure 31A
Figure 31B Civilian magazine (left)
Law Enforcement/Military magazine (right)   

Figure 32A (relationship of recoil/buffer spring
assembly to barrel locking block inside of slide)
Figure 32B (recoil/buffer spring assembly and barrel
properly positioned in the slide) 
6. Hold the slide in the non-firing hand with the thumb
holding the rear end of the recoil/buffer spring assem-
bly in place on the slide.
32
Figure 32C
.
7. Check the position of the sear axle on the frame.
Ensure that it does not protrude from either side of
the frame. (See Figure 31 on page 31) 
8. Hold the frame in...

33
Figure 33
10. Retract the slide to the point where the recess in
the left side of the slide is positioned over the hole
where the axle of the slide release will go and hold
it there.
11. Insert the slide release from left to right into the
frame until it is flush with the side of the frame.
NOTE: Assembly of the pistol is now complete. Clear
the pistol and check it for correct assembly and op-
eration. Be sure the slide moves freely on the frame
and with the pistol cleared and pointed in a safe...

34
Figure 34
4. Gradually allow the locking plate and magazine spring
to expand out of the magazine housing.
5. Remove the locking plate, magazine spring and maga-
zine follower from the magazine housing.
Disassembly of magazines produced after October
1994 for U.S. civilian use.
1. Using a blunt pointed instrument depress the locking
insert detente located in the floor plate and hold it
there  (see Figure 34).
2. Place a portion of either hand over the base of the
magazine to control the release of the...

35
Figure 35B Restricted Use Magazine
Figure 35C 10 round Civilian Magazine
Magazine Follower
Magazine 
SpringMagazine 
Housing
Locking TabsLocking Insert
Locking Tab 
Recesses
Floor Plate
Magazine Follower
Magazine 
Housing
Floor PlateLocking Plate Magazine 
Springsides of the magazine.
Figure 35A   
4. Gradually allow the locking insert and magazine spring
to expand out of the magazine housing. (see Figure
35A)
5. Remove the locking insert, magazine spring and mag-
azine follower from the magazine...

36
4. Push the locking plate down into the magazine hous-
ing against the pressure of the magazine spring and
hold it there.
5.On 10-round magazines, push the floor plate up
onto the base of the magazine housing until the
locking tabs engage in the sides of the housing. Check
to see if the locking tabs on the floor plate are
securely locked into the housing and the locking de-
tente on the locking plate fits within the hole in the
floor plate.
On restricted use magazines, push the floor plate
over the...

37
Figure 37  
“Civilian use” 10-round magazine (left), Law
Enforcement/Military “restricted use” magazine
(right)  

38
Normal Cleaning- Performed after each firing or every
twelve (12) months.
Major Cleaning- Often referred to as “detailed cleaning”.
Performed after the firing of 500 cartridges or when the
pistol is exposed to, or laden throughout with sand, dust,
water (especially salt water), or other visible contaminants
or foreign matter.
Normal Cleaning
Slide 
• Gently scrub all internal surfaces of the slide using the
nylon toothbrush moistened with solvent.
• Remove all loose fouling from all surfaces of the...

The parts can then be dried using compressed air or
with a rag and cotton swabs.
NOTE: All parts of the HK USP can be immersed in
any cleaning solvent that it is safe to put your hands
into, including ultrasonic cleaning solution. Painted
surfaces of the pistol (i.e. control lever, frame, and
extractor markings) can be removed by using
ultrasonic cleaning machines.
Inspection  
During and after cleaning visually inspect the pistol and its
components for any irregularities that may cause problems
or...

40
•  Presence of stops or tactile clicks, where applicable
•  General overall cleanliness
•  Presence of sufficient lubrication
•  Presence of corrosion or degradation of surface finish
CAUTION:This pistol has been developed by capable
and experienced engineers. Its present design repre-
sents an optimization of a combination of safety,
speed of deployment, accuracy, dependability, and
durability. Do not attempt to make this pistol
“better” by altering any of its components. Altering
any part of the...