MK40 recoil spring guide rod is getting a chubby !

[SKSears]

I picked up a previously owned MK40 last week and it runs great. The previous owner had installed a stainless steel guide rod assembly. After putting 200 rounds down range I noticed the guide rod was protruding about 3/8” past the front of the slide. It had been just slightly ( maybe 1/32”) past the end when I starting shooting. I disassembled and could find nothing wrong. Reassembled,still protruding. Has anyone had this happen? It still functions perfect! Any help would be much appreciated. Thanks Sears

[gb6491]

I picked up a previously owned MK40 last week and it runs great. The previous owner had installed a stainless steel guide rod assembly. After putting 200 rounds down range I noticed the guide rod was protruding about 3/8” past the front of the slide. It had been just slightly ( maybe 1/32”) past the end when I starting shooting. I disassembled and could find nothing wrong. Reassembled,still protruding. Has anyone had this happen? It still functions perfect! Any help would be much appreciated. Thanks Sears

Is the guide rod similar to this?

If so, my first thought would be to see if the threaded end is screwed completely in.
Reggards,
Greg.

[SKSears]

Without the springs and sleeve, I believe it would be the same as the one you pictured.

[SKSears]

Thanks for the info Greg. I locked the slide back and checked the guide rod,it was loose. Thanks

[SKSears]

Well,I took the guide rod apart,sprayed with cleaner to remove any oil,applied blue locktite and reassembled. While doing this I noticed the screw for the slide stop spring was loose and did the same to it. Going to the range on Wednesday and will see what happens!

[BirdsThaWord]

I bet you fixed it!

[SKSears]

Made it to the range today shooting 50 rounds of WWB 180 grain, checked the guide rod and it was back out about 1/32”. What’s next? This,as most of you might know does not cause a functioning problem. The pistol has performed flawlessly. Again I’ll say,this is one of the most accurate pistols I have shot!

[gb6491]

Made it to the range today shooting 50 rounds of WWB 180 grain, checked the guide rod and it was back out about 1/32”. What’s next? This,as most of you might know does not cause a functioning problem. The pistol has performed flawlessly. Again I’ll say,this is one of the most accurate pistols I have shot!

You might try the blue Loctite again or move on to red Loctite (I've removed screws treated with it by using a heat gun on them).
I have Wolff's guide rod set in my MK9: https://www.gunsprings.com/index.cfm...s&cID=1&mID=29
There is also the stock recoil spring assembly to consider.
Regards,
Greg

[SKSears]

BD86B263-3B49-4E2A-BB56-44253EFD61BC.jpgCFC565EA-7769-4EFC-AEF5-9C3C31EB1A2A.jpgThis is my first attempt at posting photos. I’m not sure how this is going to turn out! Looking at the guide rod,before I shot this last 50 rnds, it was just about flush with the fro t of the slide.I know I could use something stronger than blue lock tight but I would like to be able to take it apart at a later date when time to replace the springs if ever necessary.

[SKSears]

Sorry for the delay in follow-up report but, life happens ! The blue loctite did not hold.I probably will try the red next.In the last picture was after 50 rounds fired.