well, if the take down lever and all associated parts were replaced and he is still having the problem, then it is probably the seat in the housing......would still send it back.....This is the second time he has had the problem, he has sent it back and had it repaired once already.
I would think the number 2 would be for what cavity of the gang mold it came from, not a revision number, but all cavities are not created equalI'm keeping my o ring on one of mine and leaving the other without it. to see if it helps. I know it's only a band aid. I've looked at both of mine and on the back side of the take down lever is a number 2. I don't know what that means. Does anyone else have that. The number of posts about failures is getting alot less. I trust Ruger will fix or redesign the lever if it keeps up. These are great little guns. I think there one of the best of this type out there.
Sounds interesting......can't wait to get the report back from you after going to the range tomorrow......curious to see what effect that O ring has...If you could post some pictures (O ring placement), that would be awesome as well....thanks...I actually put in an o-ring today just for preventative purposes. DANCO #36 5/16x 3/16x 1/16 fits perfectly over the guide rod and spring. Takes a little more strength to put the slide back on and to take it off but may be better after o-ring becomes more broken in. I tried DANCO #83 but it was too big and realized it interfered with the Takedown lever where it would disengage it when the slide goes back. I feel and hear the difference just racking the slide. Will see how it fires at the range tomorrow. If it causes too many failures I will take it out and leave it alone.
add 40 rounds for mine with the same results.I've run about 400 rds thru mine with the o ring in. Broke it down had no trouble removing the slide. No ware on the o ring and the SR22 ran flawlessly with it in place. there's alot of posts with pictures on rimfirecenteral.com Go to Ruger other guns and look for the thread SR take down lever failures.