The B14r magazine extension will give you a total 12 rounds. They also add weight and a larger gripping surface to the magazine.
|Dimensions||9 × 9 × 5 cm|
BLACK, Olive Drab Green, Orange
A&J Sporting llc
I was concerned initially being that it was 3D printed, it might feel flimsy, cheap, or hastily made. None of these were true. Very solid, high quality print, has a decent amount of weight to it so it makes the mag feel 1000x better. You can tell someone put a lot of time into getting the fit and finish just right. It is just slightly finicky getting it to feed 12rnds flawlessly, but just follow some of the videos on youtube for some of the solutions. I think its more due to the retro-fit design of the extension and the original design of the Bergara mag, than the extension itself. 10/10 would recommend.
Theirs a you tube video defiantly watch before trying