The B14r magazine extension will give you a total 12 rounds. They also add weight and a larger gripping surface to the magazine.
| Weight | .2 kg |
|---|---|
| Dimensions | 9 × 9 × 5 cm |
| Colors |
BLACK, Olive Drab Green, Orange |
No instructions provided
Unit was made well, should be supplied with the correct length spring. Also you should not have to grind down the follower to get 12 rounds in. I paid you to do the engineering work? otherwise great product.