I looked all over the place and couldn't find a mount. It is probably something only military and law enforcement can obtain.
HOWEVER,
Something like that wouldn't be that hard to machine. It literally goes into the bipod hole lol. So a peg a block then two or three tapped holes on each side of the block. The biggest problem would be lining up the rail mount since you need to be sure you return back to the center line. Although if you assume that the peg is the center line then one should be able to fairly easily return to center.
HOWEVER,
Something like that wouldn't be that hard to machine. It literally goes into the bipod hole lol. So a peg a block then two or three tapped holes on each side of the block. The biggest problem would be lining up the rail mount since you need to be sure you return back to the center line. Although if you assume that the peg is the center line then one should be able to fairly easily return to center.
