Crosman MKI piercing assy o-ring.
Looking for the ring number for a URETHANE ring for the piercing assembly.
Neither BUNA nor neoprene nor silicone material work for this CO2 application.
Looking for the urethane ring number.
Just got tired of chasing the o-ring store search features.
I think dimensions are 1/2" ID x 11/16" OD x 3/32" CS. That is a 568-112 in silicone, but not the same in urethane. Need urethane number.
EXPERIENCE, n. The wisdom that enables us to recognize as an undesirable old acquaintance the folly that we have already embraced.
Hi KW, if you're talking about the o-ring that seals to the i.d. of the cartridge housing, then I believe that would be a -113. A -112 has a smaller o.d. than the cartridge itself (.693" vs. .735")... just guessing... don't have an MK.
I use these for my Crosman 600s:
I don't mind spending the extra nickel, leaks take away shooting time... hth