Just rebuilt/updated an HW55

had previously rebuilt this rifle installing a new plastic seal, made an seal adapter, lightened piston, honed cylinder, but reused old spring, cleanup of dirty trigger, and general cleanup,
deburr/polish.

I had bought all parts from Maccari (including new spring, moly, light tar, seal) but did not attempt fitting new spring.

Today I decided to do it right, scagged (set/stress)the new spring overnight, reground the spring ends square.

I then decided to make delrin spring guides and spring rotation washer replacing undersized steel spring guide.

Polished piston, straightened piston rod to inside diameter and repolished piston rod sear surface as it was rough with machining marks.

One thing I noticed was record trigger sear and drop lever surfaces were not square and perpendicular to related surface (hardened cast part orig. hand ground) so put it on the mill and squared up all surfaces with carbide end mill.

Lubed with moly and assembled.

Much smoother rifle, no twang, scratchy Ratchet operation, or creepy trigger.

Though spring was 3/8″ shorter it appear heavier cocking.

Will have to take out and see how it does.