Thumb Hole Stock for my HK 770 - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > >

Notices

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 05-19-2020, 12:46 PM
wachtelhund
US Air Force Veteran

Join Date: 
Dec 2007
Location: 
WI
Posts: 
95
TPC Rating: 
100% (1)
Thumb Hole Stock for my HK 770



Log in to see fewer ads
This isn't a rimfire, but Iím making a thumb hole stock for my HK 770. Iíve been planning on doing this for several years. I thought I would document the process here. First off, I built a stock duplicator over the last eight years and produced several stocks with it. Each time, I re-designed and re-made the duplicator improving it functioning. Iím not a machinist, but I do have a Grizzly G704 milling machine with DRO which I bought used about ten years ago. My machinist training consists of two weeks of shop training in a Vo-Tech high school 52 years ago.



About three years ago, I made a thumb hole stock for my HK 630. In doing so, I first made a master stock, by duplicating a BTR savage thumb hole stock (produced by Boydís) and then duplicating the in-letting for the HK 630. Needless to say getting the second stock to line-up to be duplicated into the produced thumb hole stock was tedious and nerve racking; considering the master was going to be used to cut a $200.00 plus piece of aged walnut. One reason why it has taken me serval years to attempt making a HK 770 stock. The wood that Iíll be using is a 20 year old, air dried Bastogne Walnut stock blank.



I decided the easiest way to produce a HK 770 stock was to use the HK 630 master. The HK 770 receiver is about 5/8Ē longer than the 630. I milled out the front of the master receiver area, magazine well and cylinder head screw bushing (front piece of the lower trigger guard). At this point I have the upper receiver and barrel 85% bedded to the master. I still have to make sure the magazine well is correctly sized, receiver action bushings and trigger guard are bedded in place. Master is now for a HK 770.
Attached Images
File Type: jpg P5180232 (2).JPG (330.6 KB, 1 views)

Last edited by wachtelhund; 05-22-2020 at 02:14 AM.
Reply With Quote
  #2  
Old 05-19-2020, 09:02 PM
wachtelhund
US Air Force Veteran

Join Date: 
Dec 2007
Location: 
WI
Posts: 
95
TPC Rating: 
100% (1)
Pictures of the thumb hole stock that I made for my HK 630. Can't figure out these pictures, one time they are to large, next time they are too small.




Last edited by wachtelhund; 05-19-2020 at 09:06 PM.
Reply With Quote
  #3  
Old 05-21-2020, 06:36 PM
PaulNZ

Join Date: 
May 2006
Location: 
New Zealand
Posts: 
268
TPC Rating: 
0% (0)
Looks great - the duplicator, the previous stock and your progress on the new stock. I just finished duplicating a stock myself (though I can't claim to have made the duplicator!) so I'll be watching with interest.

Are you going to inlet on the duplicator or the mill? I found using the duplicator for the exterior and the mill for the inletting gave me a much better result than using the duplicator for everything. Then again, your duplicator may be more accurate than mine.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 05-22-2020, 01:39 AM
wachtelhund
US Air Force Veteran

Join Date: 
Dec 2007
Location: 
WI
Posts: 
95
TPC Rating: 
100% (1)
Quote:
Originally Posted by PaulNZ View Post
Looks great - the duplicator, the previous stock and your progress on the new stock. I just finished duplicating a stock myself (though I can't claim to have made the duplicator!) so I'll be watching with interest.

Are you going to inlet on the duplicator or the mill? I found using the duplicator for the exterior and the mill for the inletting gave me a much better result than using the duplicator for everything. Then again, your duplicator may be more accurate than mine.
I'll be inletting on my duplicator. I bedded the receive and barrel to the master and will cut the entire new stock from the master. I'm working on the master forearm right now. Left a little too much wood the in the forearm of the master the first time. Master is made of maple so sanding is slow. Also, I have to build up the the center dividing section between the trigger well and magazine well. The 770 receiver is longer than the 630, 308 vs. 223. In opening up the master for the longer receiver I lost that divider. I'll use Bondo to fill the center dividing section and then mill it to shape. I finished the magazine well and cleaned it up with a file, magazine is a snug fit.
Reply With Quote
  #5  
Old 05-22-2020, 08:31 AM
pmpski_1
Appleseed Rifleman

Join Date: 
Apr 2017
Posts: 
166
TPC Rating: 
0% (0)
wachtelhund - wow. Just... wow. I am extremely impressed, both with the duplicator and what you've done with it. I hope that when I grow up and can do something this awesome. (I am already grown, no chance )
Reply With Quote
  #6  
Old Today, 12:25 AM
wachtelhund
US Air Force Veteran

Join Date: 
Dec 2007
Location: 
WI
Posts: 
95
TPC Rating: 
100% (1)
Ready to start cutting a duplicate stock. Master stock is bedded to 770 action. Second photo pieces are lined up in duplicator. Third photo router bit height is set. Fourth photo shows some of the blank wood is cut away before starting, not enough.
Attached Images
File Type: jpg P5250243 (2).JPG (481.3 KB, 0 views)
File Type: jpg P5250239.jpg (489.9 KB, 0 views)
File Type: jpg P5250241.jpg (495.0 KB, 0 views)
File Type: jpg P5250248 (2) - Copy.jpg (468.3 KB, 0 views)
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




All times are GMT -5. The time now is 06:01 PM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©2000-2018 RimfireCentral.com
x