M305 Safety Issue

[rmp7474]

Hi All,

My M305 safety engages/dis-engages and holds the hammer fine. However, with the safety engaged I can apply enough pressure on the trigger to have the hammer hooks slip off the trigger hooks resulting in the hammer slipping and being held by the safety. This presents an issue as if you release the safety the hammer drops and a discharge would occur. Am I best to try a new safety or replace the trigger and hammer? I can see there is a space between the cocked hammer and engaged safety upon visually inspecting the trigger group...

Thanks

 

[chalkriver]

Have you changed the stock recently ? Does the rifle pass the trigger after assembly test ? I am not sure if this helps but it is a way of testing your trigger and if its installed in the stock correctly.

Test goes as follows
1. #### rifle and apply safety then test ( obviously yours will fail this part).
2. Release safety and fire the action and keep trigger to the rear.
3. While keeping trigger squeezed #### the action and see if the hammer follows the bolt forward .
4. Release trigger slowly and you should hear a click and then the action can be fired .
5. Repeat this a few times to insure that the hammer doesn't follow bolt forward.

 

[rmp7474]

Hammer does not ride the bolt. Example of hammer lock slipping off trigger lock with safety applied below. It appears the safety is not applying enough pressure on the hammer to keep the trigger and hammer locks mated. When you put pressure on the trigger the hammer locks slip and are retained by the safety. This doesn't look normal to me but what do I know?

View attachment 73951

 

[45ACPKING]

that's no good at all.
I'm not giving much advice these days but in this case... here it is.
first thing I'd do is make sure the safety spring is installed correctly and hasn't broken or slipped out of position.
if it's fine....
you either have to replace the safety or the hammer, or both.
once those parts are replaced, if the problem still persists, I'd be concluding that the housing and pin locations/safety hole are out of spec.

has this trigger group previously functioned fine?
has this trigger group been rebuilt or otherwise altered?
the front hammer hooks look wrong to me as well but regardless, the hammer should not be able to move at all with the safety engaged so I think the silly short and angled front hammer hooks are possible unrelated but still no good in my view from my keyboard.

 

[The Wizard]

If memory serves me correctly, when the safety on the M1/M14 is applied the hammer is moved slightly down and is not in contact with the trigger hook and it locks the trigger so it cannot move. Your picture looks like it shows that the hammer has not been moved down and as you stated does not prevent the trigger from moving. I would state by replacing the safety.

Appling the safety cams the hammer out of engagement with the trigger. A projection on the rear of the safety blocks the trigger from moving far enough to be out of the way of the hammer sear hook. Even if you continue to pull on the trigger and disengage the safety the hammer will be caught by the safety sear of the trigger. I suspect either the safety or trigger or both are bad.

 

[rmp7474]

I appreciate the information. I have pulled the trigger housing and the internals all look good. Safety spring looks good.

The safety is not touching the hammer when applied. I am going to start with the safety and see what happens.

 

[45ACPKING]

If memory serves me correctly, when the safety on the M1/M14 is applied the hammer is moved slightly down and is not in contact with the trigger hook and it locks the trigger so it cannot move. Your picture looks like it shows that the hammer has not been moved down and as you stated does not prevent the trigger from moving. I would state by replacing the safety.

Appling the safety cams the hammer out of engagement with the trigger. A projection on the rear of the safety blocks the trigger from moving far enough to be out of the way of the hammer sear hook. Even if you continue to pull on the trigger and disengage the safety the hammer will be caught by the safety sear of the trigger. I suspect either the safety or trigger or both are bad.

exactly
although the trigger post assembly might be fine. but like you say, snapping the safety on and off, you should visibly see the hammer being pulled down and then released up. Playing with mine to refresh my thinking, there is no contact of the hammer hooks with the trigger sear and disconnect. The hammer hooks are below and clear of the trigger with safety engaged. I'd replace the safety and go from there. no sense loading up on parts you may not need to. Although, those front hammer hooks looks "very" short and stubby to me. I used to tune and build triggers "professionally" for fellow cgn'ers so have a very solid understanding of how those parts should function and look.