by AR15 Tactical | Feb 9, 2019 | 9mm AR15 Upper Receiver |
Stern Defense SD Mod 4 9mm AR-15 Upper Receiver I noticed the SD Mod 4 9mm AR-15 Upper Receiver on Brownells new product section so I spent a bit of time researching Stern Defense. I didn’t learn much. The only thing I was able to determine besides their contact...
