SMK standard XS78 .22 Take V

Final mods: added brass GMAC parts, polished the inside of the hammer unit and did 10 shots on the Chrony. Polishing the inside of the hammerunit proved to be a huge improvement, no need to preload the hammer spring anymore. A Chrony test proved preloading doesn't make any difference performance wise, without preloading the curve of the string is much better. Best chrony results when pausing 15 minutes between shots because the CO2 cools the rifle down in this state of tune. I paused 1 ...
Author: Brutuz62; Tags: smk xs78 deluxe qb airgun rifle co2 mods tuning tweaking fps qb78












