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Volquartsen Accurizing Modification for Mark IV

This is a discussion on Volquartsen Accurizing Modification for Mark IV within the Ruger Rimfires forums, part of the Pistol & Revolver Forum category; Has anybody successfully installed Volquartsne's Accurizing modification for the Mark IV pistols? If you aren't aware, this "kit" includes a replacement trigger (which is adjustable), ...


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Old January 13th, 2017, 11:09 AM   #1
 
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Volquartsen Accurizing Modification for Mark IV

Has anybody successfully installed Volquartsne's Accurizing modification for the Mark IV pistols? If you aren't aware, this "kit" includes a replacement trigger (which is adjustable), a replacement trigger spring and plunger, replacement sear and replacement hammer and hammer bushing. When installed, the gun no longer uses a magazine disconnector spring or main spring housing so the requirement to have a magazine in the gun to fire it is no longer applicable. Trigger pull pressure is greatly reduced, the replacement parts are highly polished and, in the case of the sear, much smaller. It appears that a TandemKross "Victory" flat-faced trigger should also work with this arrangement

I had no problem taking my entire frame apart and installing all the new pieces except that the hammer would constantly hang up when pushed back to the firing position (parallel to the bottom of the frame). To get the hammer out and removed from the trigger bar required pulling the safety lever pin out of the fame and then starting the entire installation process over again which is NOT fun. Hammer installation on this gun isn't exactly a piece of cake and takes a great deal of concentration and patience.

Having said that, I've now run out of patience and have sent my frame and assorted Volquartsen parts back to Volquartsen as of today. They were certainly very nice on the phone and said they would check the frame and parts to see if there might be a problem with their parts or whether I messed up putting the thing together in the first place. If it's a parts problem, they offered to make it good for no charge. If it's operator error (me), $65.00 will cover the correct installation. At this point, that fee seems reasonable and well worth it to me.

So, checking to see if anybody has done this. There's a video on YouTube of a fellow installing an accurizing kit on a Mark IV Target (which shouldn't make a difference), but he ended up using a hammer bushing from a Mark II for some reason. He never explained it on the video??

I'll update after I hear back from Volquartsen as to what they discovered and/or recommended.

Shoot safely!



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Old January 14th, 2017, 03:52 AM   #2
 
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You probably did the right thing. I've installed that kit (or another similar one by Majestic) in other Rugers successfully, but it's a matter of everything lining up right which isn't easy on the average tool bench you and I probably have. But once you do it should work. If you followed the video maybe there is something that is out of tolerance.

For instance, I bought a new sexy trigger/trigger bar from a very reputable after-market company for a 9mm Glock and installed it. My god it takes maybe 2 minutes to install it vs the Ruger stuff we do! Anyway, the trigger's "safe action" middle part kept catching the inside of the frame when I'd pull the trigger, screwing up the trigger press. And I didn't install it wrong (almost impossible to install a glock trigger wrong). emailed them and sent a quick video. They said something was off in their trigger and replaced it.

So maybe something there just is a tad too big and ain't fitting. It happens.
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Old January 14th, 2017, 07:09 AM   #3
 
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The Mkll hammer bushing just allows you to keep your stock Ruger hammer in use. some where around 98% of the improvement comes with the VQ sear upgrade. A Mkll bushing will complete the package and make the trigger pull creep free and in the neighborhood of 2lbs or less of pull.
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Old January 14th, 2017, 04:14 PM   #4
 
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I have installed that trigger, I watched that video on you tube and read the directions from Volquartsen multiple times, finally did it and got it all back to together and everything worked.Great trigger made a huge difference, waiting on the Tamdenkross to come in.
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Old January 15th, 2017, 06:14 AM   #5
 
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Friends:

Thanks for the replies. The installation of the hammer in the M4 is the toughest part and it probably was operator error. Now that the frame and parts have been sent back to Volquartsen, I'm sure they will make it right whether my error or something that's out of tolerance. Looking forward to getting the pistol back as fresh out of the box it was a wonderful gun to shoot.

I also have a M3 Target and I modified the trigger (TK "Victory") and the Majestic kit and the difference was quite remarkable in terms of trigger smoothness and reduced trigger pull.

I'm sure the outcome will be terrific.

Thanks again and shoot safely!
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Old February 1st, 2017, 09:29 AM   #6
 
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Hey pfielder. Have you gotten your Mark IV back yet? I also bought Volquartsen's accurizing kit for the Mark IV and had a similar problem. The hammer will not move when I pull the trigger. I've tried to install and re-stall maybe a dozen times, but just can't get it to work. I also watched the YouTube video you mentioned and read the Volquartsen instructions at least 20 times. I've spoken with Volquartsen and they didn't know what the issue could be. Given my Mark IV only fired maybe 300 rounds before I tried the installation of the accurizing kit, I have a suspicion that there is a design flaw in the hammer bushing or the sear. Those are the only parts that look materially different from the original parts. As an aside, I reinstalled the original parts and the firearm worked fine. Seems the issue is related to the Volquartsen kit.
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Old February 1st, 2017, 05:52 PM   #7
 
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Quote:
Originally Posted by AlphaHunter View Post
Hey pfielder. Have you gotten your Mark IV back yet? I also bought Volquartsen's accurizing kit for the Mark IV and had a similar problem. The hammer will not move when I pull the trigger. I've tried to install and re-stall maybe a dozen times, but just can't get it to work. I also watched the YouTube video you mentioned and read the Volquartsen instructions at least 20 times. I've spoken with Volquartsen and they didn't know what the issue could be. Given my Mark IV only fired maybe 300 rounds before I tried the installation of the accurizing kit, I have a suspicion that there is a design flaw in the hammer bushing or the sear. Those are the only parts that look materially different from the original parts. As an aside, I reinstalled the original parts and the firearm worked fine. Seems the issue is related to the Volquartsen kit.
I had the same problem. When I pushed the hammer all the way back to the point at which it's parallel to the edge of the frame (viewed from the side the hammer is not visible), the trigger wouldn't fire/release the hammer. I reinstalled the parts 3 times until I realized I could push the hammer up from behind into a position where it sits about a 1/4 inch above the frame at about a 30 degree angle (as viewed from the side)
It's still cocked and passes the trigger test. I put on the upper and it functioned flawlessly. The instructions say to push the hammer back all The way. It's just about impossible to push it back to just the 30 degree position - its a very short distance past that to the problematic parallel position.
I've since put about 300 rounds through it with no issues. The trigger is a fantastic improvement over the factory one.

Sent from my VK815 using Tapatalk
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Old February 1st, 2017, 08:44 PM   #8
 
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Quote:
Originally Posted by Jpdopes View Post
...I realized I could push the hammer up from behind into a position where it sits about a 1/4 inch above the frame at about a 30 degree angle (as viewed from the side)
It's still cocked and passes the trigger test. I put on the upper and it functioned flawlessly. The instructions say to push the hammer back all The way. It's just about impossible to push it back to just the 30 degree position - its a very short distance past that to the problematic parallel position.
I've since put about 300 rounds through it with no issues. The trigger is a fantastic improvement over the factory one.
+1

Thanks for sharing that. I thought that pushing the hammer to parallel was too far, but I don't have a MKIV to be sure. About 30 degrees is the normal cocked position in my other Mark pistols, so what you say makes sense.
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Old February 2nd, 2017, 04:09 AM   #9
 
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Does hammer release from 30 degree position without upper installed?

Quote:
Originally Posted by Jpdopes View Post
I had the same problem. When I pushed the hammer all the way back to the point at which it's parallel to the edge of the frame (viewed from the side the hammer is not visible), the trigger wouldn't fire/release the hammer. I reinstalled the parts 3 times until I realized I could push the hammer up from behind into a position where it sits about a 1/4 inch above the frame at about a 30 degree angle (as viewed from the side)
It's still cocked and passes the trigger test. I put on the upper and it functioned flawlessly. The instructions say to push the hammer back all The way. It's just about impossible to push it back to just the 30 degree position - its a very short distance past that to the problematic parallel position.
I've since put about 300 rounds through it with no issues. The trigger is a fantastic improvement over the factory one.

Sent from my VK815 using Tapatalk
Thanks for the reply jpdopes. Just a question to clarify... Did your hammer release from the 30 degree angle without the upper on the gun? Or did you have to install the upper to make the hammer release? Thanks for your help!
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Old February 2nd, 2017, 06:11 AM   #10
 
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VQ trigger in MKIV

I put two of the VQ triggers into Mark IV's last week; both worked very well...I also noticed that when the hammer was depressed as far as it would go, the trigger didn't seem to release it so I reset it to the first 'catch' and reassembled the pistol; works fine! One pistol was the Lite (wife's) and one was a stainless target model (mine); by the way, I shot two B-3's at 50' offhand and scored 95 and 98 respectively...the gun shoots as well as my old High Standard, S&W M41 or the Browning Medalist! ...and for a lot less money! Wife's Mark IV Lite shoots better than my Mark III Lite also, good job Ruger!
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Old February 2nd, 2017, 07:58 AM   #11
 
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Quote:
Originally Posted by Akboater View Post
I put two of the VQ triggers into Mark IV's last week; both worked very well...I also noticed that when the hammer was depressed as far as it would go, the trigger didn't seem to release it so I reset it to the first 'catch' and reassembled the pistol; works fine! One pistol was the Lite (wife's) and one was a stainless target model (mine); by the way, I shot two B-3's at 50' offhand and scored 95 and 98 respectively...the gun shoots as well as my old High Standard, S&W M41 or the Browning Medalist! ...and for a lot less money! Wife's Mark IV Lite shoots better than my Mark III Lite also, good job Ruger!
I have a feeling it has to do with the design of the VQ parts and if so, VQ needs to amend their installation instructions. At the bottom in the Safety Check box it says to cock the hammer. They should include a warning not to push the hammer all the way down/back.
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Old February 2nd, 2017, 06:57 PM   #12
 
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Mk IV

I confess ....I didn't bother looking at the instructions...
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Old February 6th, 2017, 12:31 PM   #13
 
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I got my M4 back from VF end of last week. They actually had to machine a new disconnector for my gun as I was using Tandemkross flat-faced trigger (not the VF trigger that came with the kit) and for some reason the original disconnector would not work properly with the VF accurizer kit and the TK trigger. So for $65.00 in labor and $33.00 to make the custom part and put the whole frame back together for me (and ship it back to the Boston area), I now have an amazing M4 in my hands. The trigger action is incredibly short but definitive and the reset is microscopic compared to the stock set-up. I haven't taken the gun to the range yet, but plan to when I get back from a trip I'm on right now.
I have to give big cudos to Volquartsen who were incredibly nice, very professional, and clearly stand behind everything they do or produce. I wouldn't hesitate for one minute dealing with them again in the future.
I'll try and drop a note to this thread once I get to fire the M4 with the mods. Excited to give it a go!
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Old February 11th, 2017, 02:46 PM   #14
 
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Disconnector questions

Quote:
Originally Posted by pfiedler View Post
I got my M4 back from VF end of last week. They actually had to machine a new disconnector for my gun as I was using Tandemkross flat-faced trigger (not the VF trigger that came with the kit) and for some reason the original disconnector would not work properly with the VF accurizer kit and the TK trigger. So for $65.00 in labor and $33.00 to make the custom part and put the whole frame back together for me (and ship it back to the Boston area), I now have an amazing M4 in my hands. The trigger action is incredibly short but definitive and the reset is microscopic compared to the stock set-up. I haven't taken the gun to the range yet, but plan to when I get back from a trip I'm on right now.
I have to give big cudos to Volquartsen who were incredibly nice, very professional, and clearly stand behind everything they do or produce. I wouldn't hesitate for one minute dealing with them again in the future.
I'll try and drop a note to this thread once I get to fire the M4 with the mods. Excited to give it a go!
Hi. I have the exact same set up as you do. Volquartsen accurizgin kit with TK trigger. I've tried installing both triggers with the kit and neither of them will release the hammer. I plan to call Volquartsen to ask them about it. Did they send back your original disconnector so that you could restore your Mark IV to the factory set-up? From reading your post, it sounds like they machined an entirely new disconnector. I'm just wondering because I wouldn't want them to modify my disconnector such that I can't restore it to the factory new set up just in case I decide to sell the gun at some point and the buyer wants a factory set up. Thanks!
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Old February 15th, 2017, 12:16 PM   #15
 
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Quote:
Originally Posted by AlphaHunter View Post
Hi. I have the exact same set up as you do. Volquartsen accurizgin kit with TK trigger. I've tried installing both triggers with the kit and neither of them will release the hammer. I plan to call Volquartsen to ask them about it. Did they send back your original disconnector so that you could restore your Mark IV to the factory set-up? From reading your post, it sounds like they machined an entirely new disconnector. I'm just wondering because I wouldn't want them to modify my disconnector such that I can't restore it to the factory new set up just in case I decide to sell the gun at some point and the buyer wants a factory set up. Thanks!
No they did not send back my original disconnector nor did they send back the Volquartsen trigger that came with the Accurizing kit! My bad...I was just happy to get the M4 back and didn't think longer term like you have.
Although probably fruitless at this point, I might reach out to VF to see if they might still have my parts aside somewhere. Something tells me that's a real dream!
Seems to be some sort of misfit between the VF accurizer trigger disconnector and the TK trigger when used together.
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