Air Arms Owners Club

I'm having a bit of trouble with the trigger on my new (to me) S400 MPR FT rifle. Sometimes it seems as if there's no first stage and the gun fires when I barely touch it. Other times it feels just perfect.... obvious first stage and nice second. And yet other times taking up the pressure on the first stage and then releasing it leaves the trigger with no first stage feel at all.

I'm used to rifles that allow the trigger to be adjusted with it removed from the gun and/or the gun being able to be dry fired.

Can you offer any tips on how to properly adjust this trigger?

Thanks!

Further investigation shows that if I take up just about all the first stage and then release it, there's no longer any resistance on it at all. If I only partially take up the first stage and release, the resistance remains normal.

What could be causing this?

Mtl_Biker wrote:I'm having a bit of trouble with the trigger on my new (to me) S400 MPR FT rifle. Sometimes it seems as if there's no first stage and the gun fires when I barely touch it. Other times it feels just perfect.... obvious first stage and nice second. And yet other times taking up the pressure on the first stage and then releasing it leaves the trigger with no first stage feel at all.

I'm used to rifles that allow the trigger to be adjusted with it removed from the gun and/or the gun being able to be dry fired.

Can you offer any tips on how to properly adjust this trigger?

Thanks!

Before you start adjusting anything, i would check to see if cover screws are over tightened. Rog

Roger5 wrote:Before you start adjusting anything, i would check to see if cover screws are over tightened. Rog

Cover screws?

The plate covering the trigger sears.

I'd planned on changing my trigger cover screws with S/S allen screws instead of the slotted ones. Can anyone think of a reason not to, provided I don't overtighten?
(I've already changed the other mishmash of slotted and posidriv on the butt plate area)

TenMetrePeter wrote:The plate covering the trigger sears.

I'd planned on changing my trigger cover screws with S/S allen screws instead of the slotted ones. Can anyone think of a reason not to, provided I don't overtighten?
(I've already changed the other mishmash of slotted and posidriv on the butt plate area)

AirArms changed them to Allen screws, so don't see a problem, but like you say don't overtighten. Rog

Roger5 wrote:

TenMetrePeter wrote:The plate covering the trigger sears.

I'd planned on changing my trigger cover screws with S/S allen screws instead of the slotted ones. Can anyone think of a reason not to, provided I don't overtighten?
(I've already changed the other mishmash of slotted and posidriv on the butt plate area)

AirArms changed them to Allen screws, so don't see a problem, but like you say don't overtighten. Rog

There was a fair amount of loctite in the threads that had to be cleaned out with another M3 screw (didnt need a tap) before the new screws would nip up the plate with a decent feel. I didnt loctite mine in. Does anyone?

Doubt if anybody loctites them in, leastwise I wouldn't . Rog

I was surprised AA did. Loctite on slot heads is a recipe for chewed up screws. Maybe I just chewed up my warranty!