BRIEF DESCRIPTION
OF THE
HK 94
SEMI-AUTOMATIC RIFLE
1
2
General
The HK94 semi-automatic rifle, cal. 9 mm x 19 is a modern small arm
produced in accordance with the most advance manufacturing
methods. It permits semi-automatic fire from all positions with the bolt
closed.
The HK94 is a recoil operated rifle with stationary barrel and delayed
roller locked bolt system. The cartridges are fed either from a 15-round
or from a 30-round magazine.
Note:
For reliable function only fully jacketed ammo should be used.
Existing models:
1. Rifle with fixed butt stock (Fig. 1)
2. Rifle with telescopic sight (Fig. 2)
3. Rifle from the right
4. Rifle with retractable butt stock (Fig. 4 and 5).
Fig. 1
Fig. 2
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4
Fig. 3
Fig. 4
Fig. 5
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6
Assemblies
1 Receiver and barrel, cocking mechanism and sights
2 Bolt assembly
3 Grip assembly and trigger mechanism
4 Butt stock
5 Handguard
6 Magazine
7 Accessories (page 20)
Fig. 6 Assemblies
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8
DESCRIPTION OF ASSEMBLIES
Assembly 1 Receiver with barrel, cocking mechanism and sights
The receiver connects the barrel, cocking mechanism and sights.
In addition, all assemblies are either contained in the receiver or attached
to it (Fig. 7).
The barrel is press-fitted into the barrel extension and fixed in place by
means of pins. The cocking mechanism is located above the barrel and
is employed for manually cocking and loading the weapon and for
securing the bolt in its rearmost position.
The sights consit of the front sight and rotary rear sight. The rear sight
has 4 aperture positions; the apertures, which differ in diameter, all
correspond to a uniform sight setting (sighting shot) for firing at ranges
of 25 and 100 m. Being able to select a particular aperture diameter
permits perfect individual aiming by means of the rear sight aperture,
front sight and the outer circumference of the front sight cover.
The rotary sight can be adjusted for elevation and windage.
Fig. 7 Receiver with barrel, cocking mechanism and sights
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10
Assembly 2 Bolt assembly
The bolt assembly (Fig. 8) consists of the following elements:
Bolt head carrier with recoil spring tube (Fig. 9)
Recoil spring guide rod and recoil spring (Fig. 10)
Bolt head with locking rollers, extractor
and extractor spring (Fig. 11)
Locking piece (Fig. 12)
Firing pin spring (Fig. 13)
Firing pin (Fig. 14)
The bolt assembly is housed and guided in the receiver; in conjuction
with the recoil spring, it feeds and fires the cartridge, extract and ejects
the empty cartridge case after firing, and cocks the hammer.
Fig. 8 Bolt Assembly
Fig. 9 Bolt head carrier Fig. 10 Recoil Spring Guide
with recoil spring tube rod with recoil spring
Fig. 12 Locking piece
Fig. 11 Bolt head
Fig. 13 Firing pin spring Fig. 14 Firing pin
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12
Assembly 3 Grip assembly and trigger mechanism
The grip assembly (Fig. 15) is hinged to the receiver, can be swung
down and removed from it. It houses the trigger mechanism (Fig. 16)
with hammer, ejector and the safety. The safety axle connects the
trigger housing to the grip.
Fig. 15 Fig. 16
Grip with trigger housing Trigger mechanism and safety
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14
Assembly 4 Butt stock
Fixed butt stock
The fixed butt stock (Fig. 17) closes the rear of the receiver. It is connected to the receiver by a locking pin.
The sling holder is attached to the butt stock by means of tubular rivets,
which are also employed for safekeeping of the locking pins when the
weapon is field stripped.
Retractable butt stock
The fixed but stock can be replaced by a retractable butt stock (Fig. 18)
when required.
The two guide rails on either side of the butt stock are guided in grooves
on the receiver. They are secured by a locking catch in both the retracted
and extended position.
A sling holder is attached to the back plate.
Fig. 17 Fixed butt stock
Fig. 18 Retractable butt stock
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16
Assembly 5 Handguard
The detachabel handguard (Fig. 19) encircled the barrel from below.
It is attached to the weapon by a locking pin.
Fig. 19 Handguard
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18
Assembly 6 Magazine
The magazine holds 15 or 30 rounds and is employed for feeding the
cartridges to the Rifle.
The magazine consists of:
Magazine housing (Fig. 20)
Floor plate (Fig. 21)
Follower with follower spring and locking plate (Fig. 22)
Fig. 20 Magazine Housing
Fig. 21 Floor plate Fig. 22 Follower, with follower
spring and locking plate
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20
ACCESSORIES
Multi-purpose carrying sling
The multi-purpose carrying sling (Fig. 23) is employed for carrying the
rifle while permitting the shooter to fire immediately from all positions.
Fig. 23 Multi-purpose carrying sling
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22
Telescoping sight
The telescopic sight (Fig. 24) is fixed to its mount by two screws.
The receiver of the rifle is so designed that a telescopic sight can be
attached to it without any special arrangements. (see pages 46-48).
Fig. 24 Telescopic sight
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24
HANDLING AND OPERATION
Filling the magazine
Hold the magazine in one hand (Fig. 25); with your other hand, place the
cartridge in the magazine opening, pressing hte uppermost cartridge
under the lip with your thumb.
Emptying the magazine
Hold the magazine in one hand, with the bullet end of the cartridges
pointing toward your other hand (Fig. 26). Using your thumb, push the
cartridges to the right, into your open hand.
Fig. 25 Filling the magazine Fig. 26 Emptying the magazine
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26
SAFETY FEATURES
The safety lever is located on the left side of the grip assembly and can
bet set at:
“O” = Safe and “1” = Fire (Fig. 27 and 28)
The position selected is indicated also on the right side of the grip
assembly.
How to put at safe
Set safety lever at “O”. The trigger cannot be squeezed. However, the
rifle can be loaded while in “safe” position.
Firing
Fire: Set safety lever at “1”.
Fig. 27 Safe Fig. 28 Fire
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28
Inserting and removing of magazine
Put at “safe”!
Insert magazine into the magazine well (Fig. 29) until the magazine catch
engages audibly.
To remove the magazine, push the magazine catch on the right side of
the weapon (Fig. 30).
Fig. 29 Inserting the magazine Fig. 30 Removing the magazine
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30
Loading of rifle
Put at “safe”!
Pull cocking lever rearward with the left hand, engaging it in the recess
of the cocking lever housing (Fig. 31).
Insert the filled magazine into the magazine well so that the magazine
catch locks magazine audibly into position.
Allow cocking lever to snap forward (Fig. 32).
The rifle is loaded and in “safe” position.
Fig. 31 Retracing the cocking lever Fig. 32 Releaseing the coking lever
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32
OPERATING PRINCIPLE
The weapon is loaded and cocked, with the safety off.
Pulling the trigger releases the hammer, which strikes the firing pin.
The cartridge is ignited. The powder gases thus generated drive the
bullet out of the barrel. At the same time, these gases also exert pressure
on the cartridge case.
This causes forces to act on the bolt head face; a portion of these forces
is transmitted to he receiver and a portion to the bolt head carrier, via
the locking piece; the balanced angular ratio of the locking piece and
barrel extension results in a delayed recoil movement of the bolt head.
This guarantees that the bolt keeps the barrel locked until the bullet has
left the muzzle
Fig. 33 Bolt in locked position
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34
After the locking rollers have been fully cammed into the bold head, the
bolt can continue its recoil movement. In the course of this movement,
the empty cartridge case is ejected and the hammer recocked.
At the same time, the recoil spring is compressed, which returns the bolt
to its forward position. During the course of this process, a new round is
chambered from the magazine. The extractor engages the extracting
groove in the cartridge case. As a result of the bevelled surfaces of the
locking piece, the locking rollers are cammed against the supporting
surfaces in the barrel extension (Fig. 34). The weapon is now ready to fire
again.
Fig. 34 Bolt in unlocked position
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36
STRIPPING THE RIFLE FOR CLEANING
Engage the safety!
Remove magazine.
Unload chamber; retract cocking lever and make sure that the chamber
is clear. Let the cocking lever snap forward.
Unhook carrying sling from front sight holder.
Remove butt stock locking pin and put it in the tubular rivets in the fixed
butt stock.
Slide off butt stock and back plate (Fig. 35). Remove grip assembly.
Retract bolt assembly by means of the cocking lever and remove it from
the receiver (Fig. 36).
Remove handguard.
Fig. 35 Removing the butt stock
37
Fig. 36 Removing the bolt assembly
38
Stripping the bolt assembly
Remove recoil spring from recoil spring tube by edging it off in the
rearmost position.
Rotate bolt head 90° toward your body and detach it from the locking
piece. Remove locking piece, firing pin and firing pin spring from the bolt
head carrier (Figs. 37 and 38).
To assemble the bolt assembly, insert firing pin, firing pin spring
and locking piece into the bolt head. Insert all parts in the bolt head
carrier in such a manner that the lug on the locking piece is guiding through
the recess in the bore of the bold head carrier.
Rotate bolt head until you hear it engage.
Press recoil spring into the recoil spring tube.
Stripping the pistol grip with trigger mechanism
Uncock hammer (spring).
rotate selective fire lever until it is in a verticle position, then pull out.
Remove trigger assembly housing.
Note: Further stripping of the trigger assembly housing may only be
performed by ordnance personnel. If the trigger assembly housing is
severly fouled, it can be washed out in a cleaning solvent.
Fig. 38 Stripping
the bolt assembly
39
Fig. 37 Removing the
bolt assembly components
40
REASSEMBLING THE RIFLE
Attach handguard.
Insert the assmbled bolt with recoil spring into the receiver (locking rollers
must rest inside the bolt head).
Attach grip assembly (Fig. 39).
(Set safety lever on grip assembly on “O”.)
Slide fixed or retractable butt stock onto receiver and insert locking pin.
Hook carrying sling into the eye on the front sight holder.
Check the proper reassembly of the rifle by performing several cocking
motions.
Failure to function
On principle operate the cocking lever and continue firing. Should the
rifle fail to fire, put at safe, remove the magazine, unload the rifle and
ascertain the caus of malfunction.
Fig. 39 Reassembling the rifle
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42
ADJUSTING THE ROTARY REAR SIGHT
Any corrections which may be required when sighting-in the weapon may
only be performed by adjusting the rear sight for elevation or windage.
Elevation adjustmnet:
Insert elevation adjustment tool into the rear sight cylinder (Fig. 40) in
such a manner that the wedges of the tool engage the two splines in the
cylinder, which contain the catch bolts. Press Phillips-head screwdriver
downward into the adjustment tool and hold firmly.
Rotate rear sight sylinder manually in the desired direction (rotating clockwise lowers the strike 1.4 cm (0.55 in.) per click at a range of 25 m,
rotating counterclockwise raises it correspondingly).
After performing the correction, withdraw Phillips-head screwdriver and
remove elevation adjustment tool. The catch bolts will then reengage in
the splines.
After performing the elevation adjustment, set the desire aperture again.
Fig. 40 Elevation adjustment
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44
Windage adjustment:
Correction of left-hand deviation: Loosen clamping screw (Fig. 41).
Turn adjusting screw (Fig. 42) counterclockwise, in accordance with the
required correction. Then retighten clamping screw.
Correction of right-hand deviation: Loosen clamping screw (Fig. 41).
Turn adjusting screw (Fig. 42) clockwise until the required correction is
obtained. Then retighten clamping screw.
Note: Each revolution of the adjusting screw moves the mean strike
5.5 cm (2.16 inc) to the left or right at a range of 25 m.
Fig. 41 Fig. 42
Loosening the claming screw Turning the adjustment screw
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46
USING THE HK94 SEMI-AUTOMATICE RIFLE
WITH TELESCOPIC SIGHT
The telescopic sight is mounted as follows:
Fig. 43 Telescopic sight with mount
Before attaching, swivel the claws (43/1) on the mount outward.
Place mount on the rifle from above, keeping the mount tilted slightly to
the right and rest its plastic nose against the sight cylinder.
Nost the inscription “direction of fire” and the arrow on the bottom of the
mount.
Press clamping lever (43/2) downward until the catch (43/3) engages
audibly. Raise clamping lever as far as it will go.
Fig. 44 Attaching the telescopic sight with mount
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48
Removing the telescopic sight
To remove the telescopic sight with mount, push clamping lever downward.
Press catch downward with thumb and raise clamping lever again.
Tip telescopic sight with mount to the right and remove.
Fig. 45 Removing the telescopic sight with mount
AIMING
Before aiming, set the sights for the appropriate range and select aiming
point (target).
Now aim at the target by means of the diopter hole and the front sight.
Make sure that the target appears to be resting on top of the front sight
post and is properly centered and that there is an even circle of light
betwen the inner circumference of the diopter hole and the outer circumference of the front sight holder.
In this sight picture, the front sight is centered precisely in the diopter
hole.
- Correct point of aim!-
Correct point of aim
Even circle of light
Correct position of the ront sight
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50
Aiming errors caused by uneven circle of light
Impact as with incorrectly Impact as with incorrectly
centered front sight = left centered front sight = right
Aiming errors caused by uneven circle of light
Impact as with incorrectly Impact as with incorrectly
centered front sight = high centered front sight = low
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TECHNICAL DATA
Calibre 9mm x 19
Sighting shot 25 and 100m
Weights
Rifle with fixed butt stock
without magazine 6.43 lbs. (2.92 kg)
Rifle with retractabel butt stock
without magazine 7.18 lbs. (3.26 kg)
Steel magazine for 30 rounds empty 6.00 oz. (0.17 kg)
Steel magazine for 15 rounds empty 4.23 oz. (0.12 kg)
Cartridge 185 gr. (12 gr.)
Lengths
Rifle with fixed butt stock 34.59 in. (878 mm)
Rifle with retractable buttstock 34.05 in. (865 mm)
Rifle with butt stock retracted 27.58 in. (700 mm)
Line of sight 13.39 in. (340 mm)
Barrel 16.54 in. (420 mm)
Cartridge case 0.74 in. (19mm)
TABLE OF CONTENTS
Page
General 2
Assemblies 6
Descriptions of the assemblies 8
Accessories 20
Handling and operation 24
Operating principle 32
Stripping the rifle for cleaning 36
Reassembling the rifle 40
Adjusting the rotary rear sight 42
Using the HK94 semi automatic rifle with telescopic sight 46
Aiming 49
Technical Data 52
Teps71
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