Anschütz LG250 (early)
This was another revolutionary match rifle. The reverse piston of the LG220 was replaced with a hydraulic damper unit, which absorbed recoil by forcing a piston with an undersized diameter through a bore part-filled with hydraulic fluid. It worked very well and the rifle was highly regarded by match shooters in the 1970s. The problems emerged later, when the hydraulic unit's plastic seals started to disintegrate, allowing the fluid to escape and reducing, and then removing altogether, its capacity to limit felt recoil.
At the end of these pics is a pictorial I took of an overhaul of one of these hydraulic units, with the intention of delivering a guide to its repair. I posted a thread on the American Airguns forum HERE.
Anschütz LG250 video showing recoilless action
With thanks to Matt for this video.
Check out his Youtube channel here:
Anschütz LG250 oil-filled damper reseal
The damper unit with homemade tool for opening
Damper unit opened
The old lid seal
The lid 'O' ring
New off-the-shelf hydraulic seals pic 1, pic 2, pic 3
Damper with new seals fitted
Refilling damper with automatic transmission oil
Damper resealed and refilled
Damper with lever cap reattached
Old and new bumpers
Anschütz LG250 rebuild video
This excellent video copied from the Youtube feed of 'macimaging' of the North Wales Muzzle loaders Association, who posted it in 2014.
He runs Custom Gun Parts, which advertises LG250 service kits: