Can anyone give me any info on this bolt carrier who makes it? And where i can get one? Or purchase a kit with it? The buffer spring fits around the rear of the bolt carrier, no buffer or buffer retainer, this is why it is able to have a shorter buffer tube soo cool! The buffer tube has a cap that you unscrew to remove the buffer spring in order to seperate the upper from the lower. I Looked everywhere online for parts for this setup, maybe someone can help me out?:huh: Any info would be much appreciated.