Agree with previous, mod or full (steel) tube. My brother has been a Remington man all of his life bought an 835 ulti mag at the recommendation of his local gun dealer. Gun dealer said don't clean it until it breaks and then tell me what you think. Four Seasons later he finally decided to clean the gun that it was a reliable firearm. After eight seasons the spring in the thumb safety wore out local gun dealer replaced it for free in 10 minutes. Fantastic gun.