Instruction Manual

Hop Up Unit Adjustment Hop Up Unit Cleaning
The Hop Up Unit adds a back spin to the BB to allow a longer flight path.
Before use please do so in a safe location and make sure nobody is behind
the target. When using different weight BBs you will have to make adjust-
ments. When not is use please turn the Hop Up Unit off.
Step 1. Locate the Hop Up unit slider tab in the middle of the M28 and on
the left side of the rifle.
Step 2. Slide the hop up adjuster tab back towards the trigger to add more
hop effect. Sliding forward will turn off the hop up unit.
Operational Tip: If the hop up unit is all the way off the BB might not be held
in place and could fall out the end of the barrel. This is normal and you will
need to add a little hop up to hold.
Cut the cloth or paper towel in the size as shown above. Fold the material to
fit through the loop. Adjust the length of the material to smoothly enter the
barrel. Otherwise too much material will get jammed in the inner barrel and
can cause the hop up bucking to get out of place.
Turn the hop up unit off. Disconnect the battery, and remove the
magazine. Spray silicone oil into the hop up chamber from the magwell
for 1 sec. and fire 10-15 bbs to oil inner barrel and hop up parts.
Fire 2 shots with magazine removed to clear gun of bbs and
disconnect battery.
With a twisting motion gently push the cloth and rod down the barrel.
Inspect cloth and if dirty repeat 2-3 times until clean
Note: you can apply silicone oil directly to the cloth as well.
If there is too much oil in barrel the bb trajectory will be unstable
1 )
2 )
3 )
Turn the hop up unit off. Disconnect the battery, and remove the
magazine
Use the angled end of the cleaning rod to puch the BB backwards and
out through the hop up unit.
Make sure to have the angled end facing down and silicone oil will help
loosen the BB.
NOTE: If you continue to fire the gun with a jam you will
cause more damage.