This is one of the later versions with the up-graded trigger group.
Dunnville roll stamp:
Front sight:
Rear sight:
Those rear sight screw holes go all the way into the bore. I haven't benched it yet.
For those of you wondering why sometimes these won't cock properly, it's because the sear block gets installed backwards. The fix is simple.
This one still needs a bit of tlc to get it up to power. It's to the point where it will hold air, and it does 440-460 at five pumps, after a good clean 'n lube.
Ten pumps, and the velocity drops to 420-430, with the gun blasting air out through the trigger group opening. On my 13-XX's this behavior indicates valve stem troubles. On this I'm suspecting it would be the quad seal ?
I should have taken pics of the piston and valve face when I had it apart.
I'm still pretty happy with this latest acquisition. For a gun this old to be still throwing pellets down range without anything new being added to it is on the amazing side.....
Regards,
Doc Sharptail