So a broken boltsled? Well, mine broke, more like cracked where it connects to the actual bolt. I repaired it with 2 pieces 5/64 carbon fiber rod and two pieces of carbon fiber strips. This has held up after 50 shots, and now I am trying to prevent the issue of the inverted plunger breaking off at the end where it slams into the bolt. I will have pictures of that in my lessons learned write up.
see the crack at the top
drilled through on both sides where the pin goes through and used Gorilla Glue Instant Bond
I would say use Carbon Fiber. I just repaired my Recon with CF with Gorilla Glue, instant bond, and so far so good. I used carbon fiber rod, round and flat pieces. I will post some pics and hopefully get around to posting the full lessons learned on this modification.
Here are some pics of the carbon fiber:
I bought the CF at a hobby store for airplanes and you can most likely buy it online for less.