Sorry don't know the acronym ...what is SFRC?
South Frontenac Rental Center (SFRC). They are a very good firearms dealer in Canada.
I was able to buy some (8) off of a member here. I don't think there's any steel inserts on these ones. At least not enough for a magnet to attract. Tried them out. They feed and fire great. Not the best at an outdoor range, though, that's full of spent cartridges. Took 3 shots and then spent 45Mins looking for the inserts. Maybe paint them fluorescent or bring a spotter next time. Luckily I was the only one on the range so I was able to spend the time looking.i looked into having a machinist make me up a handful...........but the problem is they are a bi-metal contraption.........aluminum outside, with a little wee insert of steel on inside..........total nightmare to produce for a reasonable price.
Head for Princess Auto, buy a huge cheap-oh TARP and 4 Tent Pegs.
Stake it out so that the Ejection Zone is in the middle of the Tarp. Should catch most of them.
Problem solved.
I have one I bought new years ago. I only used it indoors a couple of times. Kind of neat to try out, but a PITA to fiddle with. Jeez, now I'll have to dig mine out of the pile....




























