Every line of this bill belongs to another crossbow. The bowless crossbow is a skin of the crossbow: same frags, same wood, the same pair of ropes at a Level 1 bench, and no blueprint to learn, since the crossbow itself is known from the start. If you own the skin, the look shows up when you craft one; if not, you never miss it.
Rope stays the bottleneck either way. No bench crafts it, so every coil comes from barrels, crates and the recycler. Keep two in the box for every crossbow you expect to lose, and craft the wooden arrows in the same sitting.
Nothing in the numbers differs, so the choice is looks.
Questions
Bowless Crossbow ×10: how many resources?
Metal Fragments ×750, Wood ×2,000, Rope ×20.
Which workbench does Bowless Crossbow need?
Workbench level 1.
How long does Bowless Crossbow take to craft?
15 s for one, every step included.
How much scrap does researching Bowless Crossbow take?