My wife has been shooting one for 15 years or so. It's been renickeled a couple of times because of high acid content in her hands, but no trouble other than routine maintenance. I've had one come through the shop that had cracked. Customer posts on here sometimes. Krieghoff Int replaced the receiver with a new one for a small exchange fee. They don't seem to bring the same money as a steel receiver but wouldn't be afraid to buy one. Larry
I shot an aluminum rec tube set for skeet in 90's and worked well. The family I sold it to have passed it down and shot a lot of rounds. Well the lightwt receiver broke last year and Kreighoff made them a good deal on replacement. jim w.
When I talked to the folks in Ottsville I was told if you had a LtWt K-80 and the receiver cracked or became unsafe to shoot they would replace it with a new K-80 LtWt receiver & iron or if you wanted a standard weight receiver they would make you a deal - the only caveat being the LtWt couldn't show signs of intentional abuse.
I've heard accounts of these receiver's cracking etc but I've been shooting LtWt receivers (as have several friends) for a lot of years & have never had a problem.