Has anyone experienced a broken bolt or sheared lug?

[Dino11]

Bolt broke in half at the cam pin my S&W M&P 15T several years back. Round count was close to 10,000

Sent in the rifle because the front half of the bolt was locked up solid inside.

S&W shipped the entire rifle to and from on their dime, replaced the bolt, polished the chamber and sent it back all at no charge. This was all long after the warranty should have expired.

S&W has a lifetime warranty.

[Joker]

S&W has a lifetime warranty.

For some reason I was thinking it was not 100% everything covered for life.
The 2nd paragraph here may be what had me confused.

http://www.smith-wesson.com/customer-service/warranty

[rero360]

The only time I’ve seen a sheared life in person was towards the end of Squad Designated Marksmanship course in Feb 2013, one of the other guys in my class found the lug in the grass next to him at the end of the course of fire as he was policing up his brass. He kept using it after the instructors said it was fine and ended up shearing a second lug on the last day of shooting. The guns used were M16-A4s and were used for SDM and Master Gunner courses, I think one other course as well. The instructors said that our class was the last class before the guns went in for service and rebarreling which happened once a year, so figure roughly 50,000 rounds fired per year through each gun, the erosion on the rifling was visible to the naked eye.