Things I liked:They are easy to install. Things I would have changed:They are pretty pricey. What others should know:It's probably a good thing to have several of these on hand. My lower seal blew out because of a pellet that was slightly oversized.
Things I liked:- Very accurate. Once it's sighted in, it hits where you point it.
- I really like the useability of the Williams sight.
- It's nice to be able to adjust the trigger pull weight down.
- It consistently gets at least sixty shots per CO2 powerlet. Things I would have changed:The single stage trigger is very creep-y. In my opinion it is no better than the cheap production trigger on the 1377. I think I would give up the variable power level for a better trigger. What others should know:Dovetail is slightly canted (rotated) with respect to the front sight. This means that the rear sight notches are not parallel with the front post.
Grips are plastic (as with most Crosman pistols).