Things I liked:The adapter works very well. So far no issues.
A must accessory for the Hammerli 850. Things I would have changed:A little pricey What others should know:I read of people having some problems with there not being enough tension between the 2 12gram co2 cartridges. One fellow said he solved it by placing a penny in between them. I did this right off the bat.
Things I liked:I have only had it for a short time but so far it is the most enjoyable air gun in my collection.
It hits the target every time at just past 210 feet.
It is solid, accurate and fun to use.