Disassembling a Gamo Hunter 220, Part 2

On I go...

The plastic shoe, pivot bolt, e-clip and spring.

The washers are cheap plastic...

I mounted the action in the spring compressor, took up the preload and removed the stud.

The allows the trigger group to be removed.

And the pin retaining the end plug and spring comes out easily.

It's a fairly beefy pin.

The end plug comes out under spring pressure.

Plastic again and scarred up. I wonder if someone "tuned" the rifle or if it's just poor quality control.

The spring was a bit canted.

The piston.

The "top hat".

The seal was a bit burned and again, coated in sticky lube...

Not in terrible shape but I replaced it with a new one.

The breech seal is not an o-ring but a huge rubber tube.

There's a bushing in the pivot hole that retains the detent.


Detent parts.



I cleaned everything. Then I tried a couple of other springs I had laying around but none gave similar power as the original spring. Assembly was the same as disassembly but in reverse...JM lubes were used to quiet the twang.

I really lack any enthusiasm for this rifle so I decided not to monkey with it further. It works and I'll trade or sell it at some point.