They are pretty cool, I like the placement of the safety.
Don't like the early ones, the sights (especially the front) are very tall. If it's in a holster, it can make drawint it difficult as the sight would easily catch on the holster or clothing. There is a carry model that has shorter more traditional sights.
Only reason I dont get one is the ammo could stop production and oversea shipments & you'd be stck with a thousand dollar paperweight.
Can't tell from your post, have you seen this: AR57The same, I guess I would also need a 5.7 upper for an AR.