Algodoo

Very good! Nice ejection too!

Although sometimes the shells get stuck inbetween the bolt and the stock causing the bolt to not go back and a failure to extract/feed. There are 2 solutions ive found to this problem, either make the stock have no collision layers or have a farther ejection.

Other than that excellent job!

Very promising layout! I'll be a tad more critical than Clank, and will jump straight to weak points and advice as you asked.

-Contrary to Clank, I think the ejection is frankly quite poor. The "twin hinged twin extractor" setup is not very effective for good ejection, since the point of an extractor is to be a hinge point when the ejector applies force on the case, flicking it out of the action. Therefore, your inherent design has a strange ejection pattern, and weak extraction (rounds drop from the bolt) where the case slips the very back of the gun. I recommend a single, fixated extractor with a lip on the bottom to support the case (a lot of people don't do that, resulting in the case falling by gravity into the mag).

-There is no ejection port. Cases seem to spit out somewhere between the gun.

-The chamber is really too far away from the magazine, rendering the gun slow and ejecting cases when the bolt is the slowest.

-There is a wonky front buffer tube under the barrel (to prevent bolt bounce I suppose, or dampen bolt), which is not needed since you can remove restitution and add a block just for the cartridge case.

-There is no device to prevent out-of battery firing, which sometimes result in misfires.

-Please remove borders, it's easy and it looks great.

All in all, the gun has a lot of potential (which is why I comment). Best of luck for the revised version

I'll comment on the trigger mechanism itself, since that's my forte. People seem to neglect one or both of 2 things: a disconnector, and an automatic sear. You've got the disconnector, but not automatic sear, and that's really causing some reliability issues. As for the disconnector you do have, it's too small to be effective. Upon the trigger's break (point where the hammer actually drops), if the trigger were held there, the disconnector should be in position to catch it as the action cycles. In your design, it's just a bit shy of doing so, and if you kind of milk the trigger a bit, it goes full-auto-ish. Same thing with the reset: The disconnector should not release the hammer onto the sear until the trigger is pretty much completely released. this ensures the sear in is position to catch it for reset. In your configuration, if you take it too slow on release, it'll fire again. Try making that disconnector a bit larger, and add an auto sear to add reliability and consistency. The hammer should only be able to drop if the bolt is completely locked in battery.

Holy cow, it's getting so complicated already... Fixed out-of-battery firing adding additional disconnector that will release the hammer only when the round is chambered. Improved safety a little. Now you can operate with the trigger but it will not fire.

oh my god, this is perfect. Though, your auto sear is a bit over-complicated. The simplest way I can describe it is to do what you did, but dependent on the bolt being all the way forward. the back of the bolt (or whatever part of it you choose to attach the trip to) should have, as just stated, a trip that moves the auto sear out of engagement with the hammer when it's completely closed. Look at some of my designs and tutorials especially to get a better understanding. But that aside, it works. It bloody works, and you nailed the reset in single. Nice job!