However, the Trracer's sear is metal. The H7 sear is not. I'd imagine the sear would wear out before the bolt lip would.
The H7 has a steel sear.
And pump gun front bolts have been made out of aluminum for years with out problems. I have a few pumps that have thousands and thousands of shots through them over the course or the last 10 to 20 years and they have never failed.