UPDATE 3
Rival Rail Version of the Mounting parts added to suit Rival blasters, New Parts:-
QPS_MNTTOP(RIVAL).stl
QPS_MNTLWR(RIVAL).stl
QPS_MNTSIDE(RIVAL).stl
Compatible with QPS-Stealth sight also (https://www.thingiverse.com/thing:4941207).
Note:- The 'R' symbol is marked on the Rival version of parts, and also denotes the face intended to touch the 3D printer build surface.

UPDATE 2
New Version of QPS Sight is included in the Stealth Update for the Tempus blaster, here:-
https://www.thingiverse.com/thing:4941207
This features New styling, quicker assembly, with a lower parts count.

UPDATE 1
DESCRIPTION
The Zplate has been updated to house a plain M3 nut instead of tapping a thread into the plastic, this is optional but makes assembly slightly easier.
PARTS UPDATED (STL)
QPSIGHT_ZPLATE_V1-1.stl

Quick Point Sight for 3D printed Nerf blasters

DESCRIPTION
Quick Point Sight is an open sight designed to look a bit like a typical Red dot sight.
It is setup for Nerf blasters which have a large amount of dart drop over distance.
Usefull both for teaching kids basic sight adjustment & also for Nerf battles.
Attachment is for Picatinny rail.

DESIGN NOTES
Red dot sights are very affordable but if you are kitting out a number of blasters costs add up.
As a result I was looking for a 3D printed sight that was at least adjustable and setup for the more extreme adjustment range required for Nerf.
The very close couple between the front & rear sight may be of concern, but in practice it seems to work fine for a Nerf blaster.

3D PRINTING NOTES
Print out using typical PLA 0.2mm layer height, 20% infill settings, No supports.
The Body of the sight is best printed at angle on the front face (No Supports are then needed), this does benefit from a finer layer height of say 0.15mm.
(See Build Video for further details).

ASSEMBLY NOTES
I have made a quick build guide, here:-
https://www.youtube.com/watch?v=-7bykB7eI7s

Tim.

PARTS REQUIRED
M3 Plain Nuts (3x)
M3x10 Socket Hd Bolt (4x)
M3x20 Socket Hd Bolt (1x)
M3x30 Socket Hd Bolt (4x)

PARTS INCLUDED (STL)
QPSIGHT_BODY_V1-0.stl
QPSIGHT_REAR SIGHT_V1-0.stl
QPSIGHT_MNTUPR_V1-0.stl
QPSIGHT_MNTLWR_V1-0.stl
QPSIGHT_MNTSIDE_V1-0.stl
QPSIGHT_FAUXSELECT_V1-0.stl
QPSIGHT_YADJ_V1-0.stl
QPSIGHT_ZADJ_V1-0.stl
QPSIGHT_YMOVE_V1-0.stl
QPSIGHT_ZPLATE_V1-0.stl