I picked up a complete lower for $150 locally. I'm going to shoot with it tonight. Anyone who thinks they can just drop a bullet button into one of these might be in for a surprise. I'm approximating here but it went like this. The factotry mag release only has to move into the frame 1/2" where a bullet button has to go in 1" ... This part of the lw-15 seems to be slightly tapered. While that doesn't interfere with mag release operation it does prevent a bullet button from being installed. I had to remove a little bit of material from the 4 radiused corners of my bullet button to allow it to fit into the frame. Not a big deal and not a lot of material had to be removed but that was my experience.
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