DW m40 bolt spring weak Reloading, Gunsmithing and Grip Making The Dan Wesson Forum Forum


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DW m40 bolt spring weak
December 1, 2017
9:52 pm
LS in OH
Forum Posts: 7
Member Since:
April 25, 2016
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I ordered what I thought was a bolt spring from Gun Parts for my m40 and it turned out to be a very tiny spring about 1/4″ long. I am still having trouble with my cylinder unlocking and counter rotating and two local DW gurus have told me it is my bolt spring. I just took it apart again but can’t find a replacement spring for my m40. Does anyone know where to buy a correct bolt stop spring? Gun Parts listed (New Style Bolt) with their parts description so I must have an old style spring. I’m thinking any bolt spring from a large frame DW revolver would work if I can just locate one. Thanks for any info anyone can provide.

December 4, 2017
5:40 pm
Northern Illinois
Forum Posts: 332
Member Since:
October 1, 2012
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I think your friends may be  suggesting  a new ” Bolt plunger spring ”   The ” bolt spring” is what you describe. You may want to really clean up that area of your gun and the individual components for smooth reliable operation. Installing  the bolt properly can also be a bit tricky as it can bind. Good Luck

December 4, 2017
10:39 pm
LS in OH
Forum Posts: 7
Member Since:
April 25, 2016
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hugelk, You are correct. It is a weak bolt plunger spring. I installed the new plunger but had to use the old bolt plunger spring. I know it is installed correctly with no bind since the gun functions OK. I also got a spring pack from EWK but the plunger spring in the pack is made out of much finer wire and feels like it has less tension when compressed so I didn’t install it. I may have to give it a try just to see if it improves lockup. This spring is very small diameter to fit over the plunger and inside the crane so hard to find a spring with more tension. Thanks for the reply.

December 7, 2017
8:55 pm


Range Officer

Dan's Club
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December 4, 2011
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Try contacting Dan Wesson in Norwich NY, they should have all the springs.  

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