Loose SelectorsUpdated 14 days ago
Symptoms
Both sides of the selector feel loose. They no longer (or never) clicked into place as they did on the donor gun. You can move them with the lightest touch.
Firing the gun in one mode often results in the selectors moving and changing firing mode on their own. This in turn may cause you to have a dead, very hard, or very soft trigger.
The loose selectors also make it hard to find the fire mode you want, and this then results in even more trigger or cycling issues.
Causes
The Daytona kit uses the same mechanism as the donor gun to retain the selectors: two springs and two detents (one for each selector).
The primary cause for the selectors being too loose is lack of spring tension on the detents. Two L-brackets, one on each side of the trigger chassis, control the individual tension of each spring.
Another possible cause is poor detent fitment in the Daytona trigger chassis; if the detents do not protrude enough/at all through the chassis to touch the selector, then they cannot keep the selector from rotating.
It may also be possible that you installed the detents backwards into the trigger chassis.
Solutions
What You Need
- 2mm hex wrench or driver
- Loctite 243 or similar non-permanent thread lock
- Pin punch
- Hammer
- Narrow round file
Please follow the steps below to fix the loose selectors:
- Separate the upper and lower receivers and set the upper receiver aside
- Locate the two L-brackets on either side of the rear of the trigger chassis
- Tighten both the screws on top of the L-brackets using the 2mm driver, checking selector resistance
- Confirm that L-bracket screw tightness is the source of the issue, and if so proceed onto the next step
- Loosen or remove the two L-bracket screws
- Apply thread lock to the exposed threads of the screws
- Reinstall and tighten the screws, checking selector resistance as you do until your desired selector tightness is met
- Reassemble the gun
- Allow the thread lock time to dry before full use
If tightening the L-brackets didn't help, then proceed with the following:
- Remove the L-bracket screws with the 2mm wrench
- Pull both sides of the selector off the lower receiver
- Pull the trigger chassis up out of the lower receiver
- Remove the two sets of selector springs and detents from the lower receiver - you can check here to make sure that the detents were installed correctly so that the rounded end can poke through the holes in the chassis. If the flat ends of the detents faced the selector, then that is the issue.
- Push the narrow round file into the detent holes from the rear of the trigger chassis
- Enlarge the detent holes with the file
- Check progress by installing the detents and pushing them from the rear
- Continue filing until the detents move freely
- Reassemble the gun. Remember to use thread lock on the L-bracket screws