Great Product
These springs are a must have for the 66 or 73 rifles. Very easy to install and makes your rifle run smooth. Added bonus these springs wont wear out the notches on your lever.
Great in 1866 Carbine
These springs installed easily into a Uberti 1866 carbbine. The action is noticably lighter and smoother. When you get the sides off to replace the springs, use this as an opportunity to lubricate the action. I did not find it necessary to do more. Definitely purchase the replacement screws. The stock screws beg to be hurt.
Substantial Improvement
These are a well thought out and well made alternative to grinding the stock leaf springs or loosening the mounting screws to achieve a lighter and smoother lever action. I installed them in my late production Uberti 1866 and the action now rivals friends rifles with $150.00 pro action jobs. I just ordered another set for a new 1873 as well. Make sure to order the screws that compliment the kit as the stock items are very soft and (I think) a different thread pitch.