yes Oheemicus, it is once fired I assume. I let myself go wild and bought off of gunbroker. got a 458 socom and an ar57 upper with a billet lower and tons of extra's including the 5.7 brass. the 57 upper is 16 inch and is going to be a learning experience. from what I can gather it is not something you want to slap together. with 1500 brass to load I think it will be a long winter project.
I had never really paid attention to the 57 but I always liked the hornet for ground squirrels and think this will be fun for that.
I bought the package really for the 458 socom. being a 45-70 nut I really like the 458 socom. have never really liked the AR platform until just lately. might have been late 60's experience that had me disliking it.
will post my attempts with the 5.7.

the consolidation of the states into one vast republic, sure to be aggressive abroad and despotic at home, will be the certain precursor of that ruin which has overwhelmed all those that have preceded. Robert E Lee
~Molɔ̀ːn Labé Skýla~