Easy-to-mount fore-grip. Should be usable off the printer, but I recommend attaching the mirrored halves together (acetone, superglue) in order to add stability. If you print with low fill percentage, this will be necessary. I printed with 15% and it seems just fine when glued together. The final 'thing' is slightly different from the picture. There is a small inset for the screw heads. I didn't want to re-print, but I did want to add this feature as it adds a cleaner look to the assembly. Pictures shown are without adhesive, so are "as-printed". I used acetone to glue and smooth and that added a great amount of strength and improved the appearance.You will need: --- 4-40 0.5" screws, 2x --- 4-40 1.25" screws, 2x --- 4-40 Nuts, 4x I HIGHLY recommend using some sort of adhesive to glue the two halves together. This will add tremendously to the strength of the part, regardless of your fill %.