How to Install MP5 Bucking
Many air rifles are equipped with a Hop-Up, also known as "High Operation Power Up." This device acts in much the same way as rifling in a barrel of a firearm. The Hop-Up imparts backspin on the airgun ammunition resulting in greater accuracy and range. Hop-Up bucking is a small rubber tube that helps seat the Hop-Up mechanism onto the barrel. Over time the bucking can wear out. Installing a new Hop-Up bucking on a MP5 air rifle can be accomplished with little difficulty.
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Things You'll Need
- Screwdriver
- Airgun cleaner
- Silicone oil
- Airgun grease
- Replacement bucking
Instructions
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1
Unload the weapon completely. Visually inspect the chamber to ensure that no live ammunition is present.
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2
Remove the front and rear take-down screws using a screwdriver. These are located on front of and behind the grip assembly. Separate the barrel assembly from the weapon frame.
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3
Withdraw the barrel and Hop-Up assembly from the barrel assembly. Note that the Hop-Up assembly is attached to the barrel.
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4
Remove the two screws on both sides of the barrel using a screwdriver. These screws hold the Hop-Up assembly to a bracket on the barrel. Slide the Hop-Up off of the barrel.
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5
Slide the old Hop-Up bucking off of the barrel. Clean the barrel, inside and out, using proper airgun cleaner.
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6
Note the groove on the underside of the barrel. A small lip on the bucking will slide into the groove for a proper fit. Line up the bucking with the groove. Apply a light coat of silicone oil to the barrel. Slide the new Hop-Up bucking into the groove and onto the barrel until it stops.
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7
Apply a light coat of airgun grease to the exterior of the Hop-Up bucking. Reattach the Hop-Up. Insert the bucking into the Hop-Up chamber. Reassemble the weapon.
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Tips & Warnings
Ensure that you check your weapon periodically for air leaks and worn parts. This should be done once a month to ensure that your weapon continues to operate well into the future.
Never attempt maintenance on a loaded weapon.
Always keep the weapon muzzle pointed in a safe direction.
