I am an ass
, because I mistakenly told anr6t
in an IM that the bolts appear to be identical (i.e. interchangeable), but it turns out that while the bolt LOOKS pretty much the same when you see it in the carrier, once you pull the M17S bolt out of the carrier (which is a pain in the ass, btw), it is different.
Unfortuantely, the difference means that you cannot drop in an AR15 bolt.
Sorry to have provided misinformation!
Here are some pics to illustrate the difference:
AR bolt on top, M17S bolt on the bottom.
Another picture, showing how the differences mean that an AR bolt cannot fit in an M17S, because the cam hole is in a different location
Finally, even the bolt face is actually different (even though at first it looks the same) - the lugs are in the same place, the ejector is in a slightly different location - so a regular AR bolt might not eject in the correct direction