Crosman Crosman 2240 Radical Trigger Mod

[MikDee]

I made a change to both the Striker and Sear on my pistol. I milled a flat into the bottom of the Striker. I then filed the Sear to fit. This change makes for a nice Single Stage Trigger that starts at the wall, then goes bang.
I made an Instructable that illustrates the process.

Air Pistol Trigger Rework

Air Pistol Trigger Rework: The Crosman 2400 is a very nice co2 Target Air Pistol. It does however have a kinda crunchy, gritty trigger. When the gun is cocked and the trigger is slowly pulled, significant internal movement distortions are felt that really impact the aiming an…

www.instructables.com

 

[marflow 777]

it is a yes, no, maybe sort of thing for me
so i have for years told people to take .8mm of the top of the sear and with that the hammer will not need any work go to far and buy a new sear
of course, the sear spring they put in the pistol today are far too heavy they have one job hold up the sear and the trigger has to be shimmed and so does the sear
the sears that Crosman use could be wider and wider sear do exist, but they are just cheap stamped steel
i have to say i have all the different trigger from 1720 to Blue Fork to super sear to this and that but Crosman has made no effort to make anything better maybe the ones now made in China have done that
i am sad to say that the 2240 had it day in the sun but those days have passed, the Chaser is a better pistol
some might think i don't know what i am talking about but i have i dozen 2240
but of course, you are showing an idea and it is working well but not many of us have a mill

 

[MikDee]

Hi. Thanks for your comment. Take another look at the Instructable. You’ll see that I don’t have a milling machine either. I hacked my little bench drill press to work as one and the cutter is from Home Depot.

 

[blackbird1993]

I have an 2240 too and only have done a plastic screw trigger mod, so that the spring does not "stick" in the housing when i pull the trigger. I put one of the plastic screws from an old rc airplane wing in the inside of the spring which is between trigger and the bolt hook.

I needs 5 mins and zero bucks and now i think the trigger is very nice.

 

[MikDee]

For sure. Straighten that Spring!

 

[JayDee24ca]

MikDee, thanks for the instructible. I have quite a few 2240s in various forms, and your trigger modification is one I hadn't thought of. It looks like it a great way to improve the trigger; I plan to try it out on at least one of them. Its true that the Chaser is a real contender, and there are a few other nice pistols out there, but the 2240 is still a great platform, and brings lots of grins when I shoot it. So, thanks for your modification input!!.

 

[Sicumj]

Great write up. From your pictures though it still appears to have a positive cam between the relationship of the sear to hammer. Did you consider cutting the sear at a slight angel? I know that is a slippery slope but removing the need to push against the hammer is where most trigger pull comes from.

I thought mill when I first started reading until I saw the dremmel burrs. I use to only have a drill press (bench) and people would be surprised what you can do on a drill press. Good work!

 

[Mike_Lenardon]

You can also make your own sear. No fancy tools required, hack saw, vice and a couple files. I did use a drill press to drill the hole for the tap. My Lyman gage says trigger pull is 14 to 16 Oz.
My jig for alignment.

Made 2

Saftey has to be removed.

 

[MikDee]

To Sicumj-
I did put some angle on my sear, but it is very slight. Some angle is necessary since the sear rotates it wants to just slip off the striker. Without a bit of angle, the sear would push the striker backwards a bit first and disturb the trigger pull.
By itself, the sear angle can be adjusted to match the rotational path it travels. By using a drafting compass, place the point at the center of the pivot point and draw the curve onto the sear. When I did this I found that adding curve to the straight edge helps.