CNC screw QSC - RetroArms

CNC screw QSC

When using QSC quick-change spring mandrels in gearboxes may in some rare cases
the QSC of the spring pins is misaligned. This problem rarely occurs especially with gearboxes (eg AK),
which do not have a spring mandrel bolted to the stock (such as M4 guns, etc.) with a screw.

This locking screw completely eliminates the problem and allows trouble-free use of QSC quick-change spring pins.

The locking screw is made of C45 material (steel 12 050) on a CNC machining center. Surface treatment by blackening (chemical blackening). There is an M5 male thread on the screw.

Tightening is done with a flat-blade screwdriver or coins.