Answer
Jan 30, 2026 - 11:09 AM
The BG15 will be compatible with a standard milspec AR15 lower receiver. For the S&W MP15-22 you will need our dedicated Brass Goat (BG15-22), linked below. We don't have specific data on the HK, it appears to follow the profile of a milspec lower receiver, if it does it will use the BG15. The same hopper will work with both the BG15-22 and the BG15.
You can buy the BG15 deflector here: https://brassgoat.com/products/brass-goat-bg15-deflector-mount
You can buy the BG15-22 deflector and hopper here: https://brassgoat.com/products/brass-goat-ar15-s-w-mp15-22-brass-catcher-bg15-2
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