this post was submitted on 09 Oct 2025
5 points (100.0% liked)
General Discussion
423 readers
54 users here now
Discuss anything GunCAD related. If you need help, see /c/help. If you think you're discussing a thing a lot of the time, consider making your own separate community.
Abide by the global rules or be smitten.
Shitty stock image may be changed at moderator discretion.
founded 2 months ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
It could be tolerance stacking.
If the safety hole is .002" higher than your other lowers, that could be enough plus the trip distance causing the cam not to rotate as much.
Do you have a spare trigger to try cutting?
Yeah, I got about 15 lmao. It seems like the slack that’s between the lever and the cam doesn’t allow the cam to be moved far enough. But let me throw you for a huge loop lol. Sometimes depending on how Cam and lever are positioned when I shut the upper it will work, but if I open the upper again and it’s not in that exact same spot it stops working.
My guess would be that the trip isn't moving the lever far enough.
You can rotate the cam by hand. And the slack range would change based on the initial position. The big question is if it's in a functional position when you install the upper, does it fully return to that functional position after cycling.
If not you'd only get a round or two off before it shifts.
When it does function I will get like 5-7 round burst and then goes to dead trigger, I the. Rack it and I’ll get like 5-7 more and then Dead trigger and it repeats that. But it only does that if I have it in that “just right” position when I close the upper.
Yeah so it definitely seems like it's "wiggling" out of spec. Is your upper trimmed properly? Nothing preventing the lever from forcing back enough?
If you try a fresh trigger, I'd trim it with a little bit more left than usual. So that you have more area for the cam to push on earlier in the rotation.
Ok so I have done a lot more investigating into the problem that I’m having with my deAR22 SS and it’s not when the lever comes back forward, it’s not pushing the lever back enough to release the trigger. It likes about 2mm letting it release before it goes back forward.