NERF Recon MK2 -- Dead Space Reducer + Plunger Rod Guide + Spring Spacer

NERF Recon MK2:

*  Deadspace Reducer
*  Plunger Rod Guide 
*  Spring Spacer

These can increase the fps and the reliability.

Glue the deadspace reducer in the Plungerhead with some E6000 or similar (before gluing, remove silicone oil with dish soap and warm water).
A side effect of this dead space reducer is that the plunger is pushed back 2 mm further when priming, which can also help with catch problems if the plunger does not engage properly on the catch.

The plunger rod guide is designed to stabilize the plunger during priming. If the plunger rod isn't tensioned parallel to the plunger tube, it can lead to catch problems and misfires. This sleeve can prevent that. Just put it in the buffer tube (do not glue it).
 

If all these measures don't work and you're still having problems with the catch of your tuned blaster, it's most likely the catch spring. Replace it with a stronger one. For me, the stronger spring ultimately solved the catch problem on my modified Recon MK2 (although the existing catch spring was already pretty strong^^)

The spring spacer is only reccomended for weak springs like the stock spring. Just thread it onto the plunger rod between the plunger head and the spring.

My other Recon mods free to download in my Printables.

The files are already pre-oriented:

My print settings for PLA:
0,2mm layer height
5 walls
20 gyroid infill
7 top and bottom shell layers
NO supports needed