Automatic safety release EK Archery Cobra Siege 300 / Adder

UPDATE: The extension is available in different sizes. Apparently there are deviations of up to 2 mm in the Siege. Therefore, the extension is now added in 5 sizes from the original measurement in 0.5mm increments. Gr1 has worked for most so far.

This is an attachment that automatically releases the safety on the Ek Archery Cobra Siege 300 and Adder after cocking. This can be deactivated at any time by removing the "extension of the safety pin". The automatic safety release makes sense if you shoot the Siege/Adder with a magazine. Without a magazine, I would advise against using it for manual insertion of the bolt.
The "safety pin extension" can then be attached to the "automatic safety release" when not in use so that it does not get lost.

The two handle screws must be replaced with longer ones:
2 pieces UNC #10-24 x 7/8" pan head screw

P.S.: I have designed this for the left side, as I unlock with the "trigger finger" (right-handed) when deactivating the automatic safety. For left-handers, this can of course simply be mirrored.

Update 07.Feb.2026: Left unlocking added

Layer height adaptive / 0.16mm / 0.20mm

PETG (PLA etc. should also work)

5 wall loops, 95% infill