Put an 7-2 in an 7-4 stock (trigger mod) - Page 2 - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > >

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #16  
Old 09-06-2019, 03:00 PM
hara-julu
US Air Force

Join Date: 
Jan 2014
Location: 
MA
Posts: 
75
TPC Rating: 
0% (0)


Log in to see fewer ads
TS,

I have had it all apart, just neglected to capture it on film. Mostly would have shown me cursing and searching under the bench floor very small very important parts! Yes, if one were to go so far as add adjust-ability to an 7-2, for the stage one resistance, it would entail drilling and tapping right below the spring attachment on the inside bottom of the trigger assembly. Then find an nice threaded rod to match the threads, flatten the bottom end and slot for screw-driver. On the top of this and inside the trigger housing would be an "end cap" with an attachment point for the end of the spring. So as you loosen the threaded rod (back it out) is extends the spring adding tension. The end cap is not threaded but picture a ball end on the top of the threaded rod, and an end cap with a ball shape crown with a slot on one side to allow the rod and ball end to enter but not leave under stress. so this basket like end assembly keeps mechanical attachment to the threaded rod as it turns and does not itself turn. The actual part is even nicer because it has machined sides which "ride" in an race provided to further ensure no spring twisting. It is an small part, and it will try very hard to blend in with whatever is on the floor under your bench.
Reply With Quote
  #17  
Old 05-04-2021, 02:58 PM
JSchell1309

Join Date: 
May 2021
Posts: 
17
TPC Rating: 
0% (0)
@hara-julu, or anyone with both a 7-2 and a 7-4 Biathlon rifle:

Do you think a factory 7-4 flat trigger shoe, like the one found HERE at Larsen would be able to drop into a 7-2 and function correctly?

I'm wondering if instead of modifying a 7-2 trigger I can just order a 7-4 factory trigger and drop it in, hoping the pin and sear engagement positions match up correctly.

I know this thread is a few years old, it's just some excellent information. I'm just digging up old stuff hoping some of these guys are still somewhat active here.
Reply With Quote
  #18  
Old 05-06-2021, 02:21 PM
midwest swiss's Avatar
midwest swiss
NRA Member - Click Here To Join!

Join Date: 
Sep 2005
Location: 
minnesota
Posts: 
5,576
TPC Rating: 
0% (0)
Quote:
Originally Posted by JSchell1309 View Post
@hara-julu, or anyone with both a 7-2 and a 7-4 Biathlon rifle:

Do you think a factory 7-4 flat trigger shoe, like the one found HERE at Larsen would be able to drop into a 7-2 and function correctly?

I'm wondering if instead of modifying a 7-2 trigger I can just order a 7-4 factory trigger and drop it in, hoping the pin and sear engagement positions match up correctly.

I know this thread is a few years old, it's just some excellent information. I'm just digging up old stuff hoping some of these guys are still somewhat active here.
Yes if you can find parts you can convert a 7-2 trigger to be the same as a 7-3 &7-4.
Or if you can find a complete 7-3 or 7-4 trigger it should be a drop in fit.
That's one of the problems with these Russian rifles....no parts and if ya find parts $$$
Here is my 1/2 done 7-2 project.
https://www.rimfirecentral.com/forum....php?t=1189633

Last edited by midwest swiss; 05-06-2021 at 08:19 PM.
Reply With Quote
  #19  
Old 05-06-2021, 08:47 PM
Gobber
Veteran NRA Member - Click Here To Join!

Join Date: 
Dec 2011
Location: 
Herndon, VA
Posts: 
283
TPC Rating: 
0% (0)
The problem is getting the trigger pivot piece (#60) that the blade shoe (#63) clamps down on.

Here's the trigger section of the 7-4 parts diagram


Larsen has the blade trigger (Item 63) but not Item 60. At least they didn't have any available a few years back when I was trying to do the same thing for a stock I was fabricating.

The Basic 7-2 has the trigger and pivot at one piece - Item 33.


One of these days I would like to replicate a trigger pivot like Item 60 that could accommodate an available blade trigger (anschutz) but just haven't had enough of an itch to move it higher on the 'to do' list. But if it's like the other parts of the 7-2, it would probably not be terribly difficult. Yet another reason we like them so much
Reply With Quote
  #20  
Old 05-07-2021, 10:15 AM
JSchell1309

Join Date: 
May 2021
Posts: 
17
TPC Rating: 
0% (0)
Quote:
Originally Posted by Gobber View Post
The problem is getting the trigger pivot piece (#60) that the blade shoe (#63) clamps down on.

Larsen has the blade trigger (Item 63) but not Item 60. At least they didn't have any available a few years back when I was trying to do the same thing for a stock I was fabricating.

The Basic 7-2 has the trigger and pivot at one piece - Item 33.
Thanks for the photos clarifying that. After I posted this I noticed Piece #60 looked like the actual pivot and sear engagement piece and that #63 wasn't enough to drop into a 7-2.

I may reach out to Larsen and see what they have and place an order for import. Need a few factory 5 round mags. I'm really looking for #44 the extended 7-4 bolt handle. I called Altius and he said he didn't have any on hand at the moment. Good guy to chat with though, he answered a few of my questions on these rifles and their differences to the 7-4.

Worst case I model and 3D print one to slip fit over the 7-2. Just seems like that would be a huge ergonomic improvement to keep your hand from moving as much to push the bolt back into battery.

Gobber, you have one of those 7-4 handles right? Big improvement?

Also Midwest Swiss, thank you for linking your trigger and stock project. I need to read through it all on my lunch break. That stock looks fantastic in the end of your post!

Last edited by JSchell1309; 05-07-2021 at 11:22 AM.
Reply With Quote
  #21  
Old 05-08-2021, 10:07 AM
midwest swiss's Avatar
midwest swiss
NRA Member - Click Here To Join!

Join Date: 
Sep 2005
Location: 
minnesota
Posts: 
5,576
TPC Rating: 
0% (0)
Quote:
Originally Posted by JSchell1309 View Post
Thanks for the photos clarifying that. After I posted this I noticed Piece #60 looked like the actual pivot and sear engagement piece and that #63 wasn't enough to drop into a 7-2.

I may reach out to Larsen and see what they have and place an order for import. Need a few factory 5 round mags. I'm really looking for #44 the extended 7-4 bolt handle. I called Altius and he said he didn't have any on hand at the moment. Good guy to chat with though, he answered a few of my questions on these rifles and their differences to the 7-4.

Worst case I model and 3D print one to slip fit over the 7-2. Just seems like that would be a huge ergonomic improvement to keep your hand from moving as much to push the bolt back into battery.

Gobber, you have one of those 7-4 handles right? Big improvement?

Also Midwest Swiss, thank you for linking your trigger and stock project. I need to read through it all on my lunch break. That stock looks fantastic in the end of your post!
You mean this stock project

Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Trigger happy JetGirl CZ / Brno 116 10-08-2021 11:22 PM
My 3 10/22 super stock IanC SuperStock 2 01-13-2019 02:15 AM
"New" John Langley CZ Trigger On The Way dnttech CZ / Brno 16 02-01-2018 10:05 AM
Ishmash CM2 Trigger Spring Mod thesandman Russian Rimfires & Biathlon 1 07-08-2017 12:44 PM
Custom CZ 455 Benchrest Stock dnttech CZ / Brno 19 05-10-2017 08:36 AM



All times are GMT -5. The time now is 01:16 AM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright 2000-2018 RimfireCentral.com
x