Heckler And Koch HK SL8-1 Operators Manual

21 Forward assist
If the exterior of the rifle is very dirty (sand, mud etc.) the cocking lever
can also be used as a forward assist.
To use the cocking lever as a forward assist
1 •  Swivel out the cocking lever and push it inward against the bolt
head carrier (the cocking lever remains in its swiveled position).
2 •  Push the bolt head carrier with the cocking lever forward until it
fully locks closed.
3 •  Pull the cocking lever outward and let it swivel to its initial
position (parallel with the bolt...

22OPERATION OF PARTSBolt Locked
The barrel is tightly screwed to the barrel extension by means of a nut.
The bolt head carrier houses the bolt head which can move along its
longitudinal axis inside the bolt head carrier. Additional to its longitudinal
movement the bolt head can also rotate around its longitudinal axis.
In the locked condition the bolt head is in the foremost position. The bolt
head in the bolt head carrier is turned in such a way that the locking
recesses of the bolt head engage the...

25 Stripping into assembly groups
1 •  Use the 5 mm Allen wrench of the HK tool and remove the hex
headed Allen screws located on the left and right sides of at the
rear end of the receiver
2 •  Remove the locking pin above the front end of the trigger
guard.
3 •  Pull buttstock with trigger back out of the receiver.
4 •  Pull the cocking lever to the rear and remove the bolt.
5 •  Pull out the locking pin at the handguard and remove the
handguard to the front.
6 •  Push the magazine catch, swivel the...

27 Disassembly of the bolt assembly
1 •  Push the firing pin retaining pin to the left (e.g. with
gas piston) and detach.
2 •  Remove the firing pin to the rear.
3 •  Take out the cam pin to the left.
4 •  Detach the bolt head to the front.
Figure 29  Bolt head disassembled
DISASSEMBLY OF THE SL8-1
26DISASSEMBLY OF THE SL8-1Disassembly of the push rod and the gas pistonCAUTION: The push rod is under considerable spring tension. Use
caution when installing and removing it. To avoid injury to yourself
and...

29 Figure 31 Installing the push rod
Assembly of the SL8-1
1 •  Slide the handguard from the front over the barrel and the
receiver. Align notches onto studs.
2 •  Fasten the handguard with the locking pin.
3 •   Place the front of the magazine well onto the bearing studs,
swivel the rear of the magazine well upward all the way until it
engages the magazine catch.
4 •  Insert the bolt assembly from the rear into the receiver together
with the recoil spring.
5 •  Push buttstock assembly with trigger...

31 Buttstock adjustments
Cheekpiece and buttplate can be adjusted by means of removable
spacers to the user’s preference.
Adjustment of buttstock length
1 •  Use the 5mm allen wrench of the HK Tool to remove the hex
head screw on the left and right side of the rear of the buttstock
assembly.
2 •  Pull buttplate with spacer back out of the buttstock.
Figure 35 Remove buttplate with spacer
3 • To adjust the buttstock length to your requirement you can use
up to five spacers. Each spacer is 10 mm...

33 Sight Adjustments
If the point of impact of several shots does not coincide with where you
aimed, a sight adjustment is necessary. The SL8-1 is zeroed at 100
meters point of aim point of impact using the 100 meter rear sight
aperture. For zeroing, select the 100 meter rear sight aperture.
Elevation Adjustment
•  If shots are high, elevation adjustment screw is turned clockwise with
the 2.5 mm Allen wrench of the HK Tool.
•  If shots are low, turn the screw counterclockwise.
•  A full turn of the...

35 Optical sight with 3x magnification
Instead of the standard iron sights, an optional optical sight with 3x
magnification can be used on the SL8-1.
The sight comes with 2 Phillips screws, 2 spacers and 2 threaded
washers, to be mounted to the rail after removing front and rear sight.
Figure 40  Optical Sight
Optical Sight Reticle
The reticle of the optical sight is provided with range marks from 200 to
800 meters in increments of 200 meters.
The outer lateral surfaces of the circular reticle...

37 Figure 42Optical sight elevation adjustment on the SL8-1 
Windage Adjustment
•  If the weapon’s point of impact is too far to the right, turn the windage
adjusting screw counter clockwise in the direction of the “L.”
•  If the weapon’s point of impact is too far to the left, turn the windage
adjusting screw clockwise in the direction of the “H.”
NOTE: One graduation changes the point of impact by approx.2.3 centimeters (1.0 inch) at a range of 100 meters
Figure 43  Optical sight windage adjustment on...

39 HK SL8-1 Combination Tool:
All the necessary tools to adjust and field strip the SL8-1 are part of the
HK combination tool.
Figure 44   HK Combination Tool
1. Allen wrench 2 mm (iron sight, windage adjustment)
2. Allen wrench 2.5 mm (iron sight, elevation adjustment,
Optical sight, adjustment)
3. Allen wrench, 3 mm 
4. Allen wrench, 4 mm
5. Allen wrench, 5 mm (Allen head screws buttstock/receiver
and buttplate adjustment)                                 
6. Phillips screwdriver (cheekpiece...