I would like to purchase a 9mm upper, mag block, buffer, hammer. I am considering this kit:
http://www.americanspiritarms.net/st...on=show_detail
This will be a training gun, an cheaper alternative to .223. Does anyone here have experience with this kit? How does this compare to RRA? I would like to ramp the bolt. Will I need to swap out the hammer that comes with the upper?
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