Canted Iron Sights + Sling Mount — Picatinny (Sillybutts Excalibur / Alchemist)

Print a FRONT and a REAR unit and slide them onto your top rail. Each is a stout, full-wrap clamp that grips the whole rail profile — not a shallow lip (the real reason cheaper clamps pop off when you sling the blaster) — locked down by two M3 screws that seat into the recoil slots.

CANTED TRENCH SIGHTS — Rear unit has twin rails forming a channel; front unit has a single rail that centers in that channel. The whole sight plane is canted ~32° so you roll the blaster slightly to bring them level: fast to pick up, out of the way the rest of the time.

OFFSET SLING LOOP — A 25 mm (1") webbing slot on each mount, angled down and away from the sight line so the strap never crowds your sight picture. The load rides on the rail, not the screws.

Right-handed as drawn (sights on the shooter's right). The parametric source (.scad) is included — set HAND="left" for a left-shoulder build, or change the cant angle / height.

Designed for a Sillybutts Excalibur or Alchemist top rail (they share the same profile). This is an independent, unaffiliated accessory — bring your own blaster.

PRINT SETTINGS — PLA, 0.2 mm layer, 5 walls, 25% gyroid infill, NO supports. Print in the orientation as saved in the file (it stands on the clamp feet). Everything is support-free by design. About 20–30 g / 60–90 min per unit.

HARDWARE (per mount): 2x M3x12 mm socket-head screws (lock-screws); 2x M3 brass heat-set inserts (press into the deck holes); ~25 mm / 1" webbing for the sling.

INSTALL: 1) Press an M3 heat-set insert into each of the two deck holes. 2) Slide the mount onto the rail from an open end. 3) Tighten the two lock-screws until the tips seat in a slot and pull it down solid (locks at 10 mm slot increments). 4) Thread webbing through the sling slot.

PRINT THE FIT COUPON FIRST (coupon.stl) — Three short clamp sections labeled A / B / C (0.15 / 0.22 / 0.30 mm clearance). Slide each onto your rail and keep the one that goes on firm with no rock, then print the full front + rear at that clearance.

FILES: front.stl + rear.stl (the two mounts — print one of each; two sets for both blasters); coupon.stl (the A/B/C fit-test blocks — print first); pic_sight_sling.scad (parametric source: handedness, cant angle, height, clearance).

Designed with AI assistance (OpenSCAD), measured to the real rail, and print-tested on an Alchemist.