Heckler And Koch HK Mark23 Operators Manual

41 NOTE
Always strike the sight on the sight base, not
on the sight blades.
e. Retighten the rear sight retaining screw.
f. Confirm your battlesight zero by firing the
pistol again.
2. Elevation Adjustments -To adjust the vertical
(up and down) impact of the projectile follow
these steps below:
a. Clear the pistol!
b. Determine the amount of vertical change, in
inches, that is required at 25 meters. Note
the index mark on the rear sight and its
relationship to the index mark on the slide.
c. Loosen and...

42 removed from the pistol is unmarked (standard).
1) Figure 25 shows that the rear sight marked -4
would lower the point of impact two increments,
or a total of 4 inches, from the standard
unmarked rear sight removed from the pistol.
2) The -4 sight would be the correct one to
install. Obtain the exchangeable rear
sight from the kit  delivered with the
pistols.
Raise Point of Impact (Inches)
Lower Point of Impact (Inches)
-6+6
+4
-4-2No Marking (Standard)+2
Figure 14
C. Zeroing
1. The battlesight zero...

43 SECTION IV - TROUBLESHOOTING PROCEDURES
 3.11  Operator Troubleshooting Procedures
PROBLEM SYMPTOM/CAUSE REMEDY
1. Round does not feed Fouled magazine or pistol Clean and lube pistol and magazine
Improperly assembled Assemble correctly
Incorrect loading procedure used Load pistol in accordance with instructions
in operator’s manual
Unserviceable magazine Replace magazine2. Round does not chamber Dirty or damaged magazine Clean and lube or replace magazine
Obstruction present in chamber Remove...

44 PROBLEM SYMPTOM/CAUSE REMEDY
3. Slide does not lock Fouled barrel locking block or slide Clean and lube barrel locking block and
fully forward slide
Dry component parts or pistol Lubricate pistol in accordance with
instructions in operator’s manual
Damaged or burred slide, barrel Return pistol to the HK Service Depart-
locking block, or recoil/buffer ment for service
spring assembly. Buffer spring
retainer roll pin drift. *4. Pistol does not fire Faulty ammunition Replace ammunition
Little or no sign...

45 PROBLEM SYMPTOM/CAUSE REMEDY
6. Cartridge does not extract Fouled chamber Clean and lube
Ruptured cartridge case in chamber Remove ruptured case, clean and lube
chamber
Fouled or corroded ammunition Replace ammunition
Pitted or damaged chamber Return pistol to the HK Service Depart-
ment for service
Broken or damaged extractor Return pistol to the HK Service Depart-
or extractor spring ment for service7. Operating controls do not Damaged or improperly assembled Return pistol to the HK Service Depart-...

46
Position No.        Item Description Part No.1 extractor 215707
2 extractor spring 215708
3 rear sight retaining screw 215711
4 rear sight, 6.3mm standard (unmarked) 215770
rear sight, 5.5mm (-4)* 215767
rear sight, 5.9mm (-2)* 215768
rear sight, 6.7mm (+2)* 215771
rear sight, 7.1mm (+4)* 215774
rear sight, 7.5mm (+6)* 215783
5 front sight 215721
6 firing pin 215705
7 firing pin spring 215706
8 firing pin block 215709
9 firing pin block spring 215710
10 firing pin retaining pin 986432
11 extractor pin...

47
Figure 15  Exploded Diagram
   HK Mark 23 Pistol
3 5
4 2 1
6 7
8 9 11
10
1918
17
16
15 14
1312
20
21
2223
24
25
26
2732
283534
33
31
30
29
40 36
37
3839
48
4746
45
44
43 4241
49 505152 53 63
54
55
56
57 58
59 62
60 616465 

48
CHAPTER 4- AMMUNITION
The Mark 23 pistol was designed to operate best
using two types of .45 ACP caliber ammunition.
They are:
A. M1911 230 grain Ball
B. Commercially Manufactured 185 grain +P
Jacketed Hollow Point (JHP)
WARNING
The use of incorrect ammunition in the pistol
could result in damage to the pistol and/or
injury to the operator or bystanders
DO NOT USE
•   Reloaded, remanufactured, or military surplus
(foreign or outdated) ammunition
•  Ammunition loaded in aluminum cartridge cases
•...