Light weight English guns regularly appear for sale in the UK. My Charles Lancaster Twelve Twenty's weigh approx 6lbs and the Churchill Premieres I have weigh less than 6 1/4 lbs. These guns are used regularly for driven game shooting and are a delight to use and carry to the peg. I do not think that lightweight guns wear out any quicker than conventional guns and due to their fantastic level of workmanship and quality of materials used and will last eaqually long as heavier guns Many of these guns suffer from having the stock shortened to suit a youth or lady shooter. Nearly all the lightweight guns offered for sale seem to have been cut and then lengthened with wooden extensions.
Bob