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Centerfire Rifles - Manually Operated Lever action, bolt action or other non gas operated centerfire rifles.

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  #1  
Old 03-25-2018, 9:45 PM
lordmorgul lordmorgul is offline
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Default TC Compass Modifications

Going to post a few modifications I’ve made to my TC Compass including the stock stiffening and fill.

Welcome any other modifications you want to post of your own Compass!

Also posting a link to other active thread on TC Compass, have good stuff there but I thought a specific mods and pics thread would be appropriate.

Pending install M-Carbo trigger spring kit for lower trigger spring weight adjustability.

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Last edited by lordmorgul; 04-30-2018 at 10:54 PM..
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  #2  
Old 03-25-2018, 9:45 PM
lordmorgul lordmorgul is offline
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Default TC Compass Modifications

Link to other active TC Compass thread

Has info on bolt handle replacement and pics.

http://www.calguns.net/calgunforum/s....php?t=1400608
T/C Compass $198.98

Last edited by lordmorgul; 03-26-2018 at 11:26 PM.. Reason: Fix url
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  #3  
Old 03-25-2018, 9:46 PM
lordmorgul lordmorgul is offline
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Default TC Compass Modifications

Stock Stiffening and Butt-stock Fill

The foreend of the TC Compass synthetic stock is weak and easily flexes, so I’m trying to reduce that at a cheaper cost than replacing the stock entirely, for now. A Boyd’s stock or other chassis eventually may be nice but maybe this will suffice and it will stay with me. Here we go!

I got some ideas from YouTube videos, such as the plastic BBs.

Butt stock is getting filled with silicone per some YouTube videos I watched and thought it was a good idea as well.

Supplies from Amazon.
The black plastic weld epoxy is one of several options but nothing really adheres well to glass reinforced nylon so you’re going for the best you can get. There are other options out there, even surface prep treatments that supposedly help, search if you like. I forged ahead with this.



Remove foam.



Add new sling attachment for cross-body front carry.



Add reinforcement for it. Do not over tighten this stud as you squish the stock wall in to the center web and the recoil pad wont fit anymore. The plastic BBs for air soft are hopefully (intent without analysis) making a lattice here for structure at less weight and less brittle than solid epoxy would be here. The attachment is through the side and into the nylon glass synthetic stocks own center web anyway so probably not needed but why not.









Fill butt stock with silicone and insert the recoil pad, keep in mind this will be a destructive removal if you want to replace the recoil pad from this point. If you don’t want that then use less silicone and make sure to cure before inserting it.


Last edited by lordmorgul; 03-25-2018 at 11:23 PM..
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  #4  
Old 03-25-2018, 10:06 PM
lordmorgul lordmorgul is offline
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Default TC Compass Modifications

Now for the foreend stock stiffener. I added another sling attachment here, Ching sling style. If you do the same, probably want to locate this about an inch closer together, I think I got mine too far from the front one. I planned to use this point when the bipod is installed but it’s still a little barrel heavy to actually carry it across back this way with closer attach point.


Added epoxy support for that sling post. The stock wall is pretty thin.


Rough up the inside of the stock channel with a tool, sandpaper, whatever. I used Dremel.


Mix the black plastic weld epoxy and more BBs and start to fill in the stock areas. This epoxy claims 5min work time, I honestly thought it was more like 75sec until starting to get stringy and un-spreadable do work fast in small batches.

Cap off over the top with more epoxy, filling as solidly as you can, fill voids. Maybe use multiple coats over different days, I did the BBs first day, overcoat second day.

Cure 24 hrs, then start to fit and clear the way again for proper free float. I’m going with the space necessary for this sticker, didn’t measure it, it fit nicely before I started so going for the same.




Using sanding wheel end of Dremel, a bit of hand work here. Working toward using the preexisting stock webs to guide here, expose the tops of each.


Final sanded surface, fit check.



Go! Or polish this smoother if you care, I’m good here for test.


It is definitely heavier, better balance from the stock fill silicone, I forgot to weigh the overall gun or the stock before starting so I could weigh it final but need someone else to weigh a factory stock taken off the gun to get a delta.

This epoxy is still outgassing and stinking up my gun safe a week later... just an FYI for planning, some outdoor activity and heating it up some with use might help.

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Last edited by lordmorgul; 03-29-2018 at 11:10 PM..
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  #5  
Old 03-26-2018, 3:40 PM
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Very nice.

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Old 03-26-2018, 3:53 PM
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Just to do it I filled a cheap plastic stock with expanding foam and flat stock aluminum. Worked great and added very little weight.
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Old 05-05-2018, 10:45 PM
lordmorgul lordmorgul is offline
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Default TC Compass Modifications

Just installed the M*Carbo TC Compass Trigger Spring Kit. Comes with a hunting and bench rest main trigger spring, I chose the bench rest one.

I had previously put in one of my own mod springs (a cut down AR15 LPK Mag catch spring). That worked but gave me more like 1.5lbs and I never went to shoot it, maybe a little light and I couldn’t adjust anymore than that.

This kit is great, about 2lbs or so to start all the way loose, can tighten up from there if wanted. (Disclaimer: I do not have a good pull weight scale, used a pound of butter and string actually... need to work on that, YMMV)

Four new springs in the kit, you choose and use three.

Highly recommend this! (I have not shot it yet, but it’s a nice trigger in the garage!)

https://www.mcarbo.com/thompson-cent...pring-kit.aspx



About $26 shipped to me I think it was.


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Last edited by lordmorgul; 05-06-2018 at 10:34 AM..
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  #8  
Old 05-09-2018, 11:33 PM
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Quote:
Originally Posted by lordmorgul View Post
Four new springs in the kit, you choose and use three.

About $26 shipped to me I think it was.
$26 for 4 little springs?
Ouch.
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  #9  
Old 05-10-2018, 10:09 PM
lordmorgul lordmorgul is offline
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Quote:
Originally Posted by ar15barrels View Post
$26 for 4 little springs?

Ouch.


I wouldn’t argue, you’re correct that’s not a bargain for the springs themselves, but if I walked in and asked you to find three springs at random that make this work you’d probably want $26 for your time. :-). If someone doesn’t want to or doesn’t have the skills to do the trial and error personally, $26 is a bargain to custom fitting each gun, these are tried and work.


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  #10  
Old 05-09-2018, 6:11 PM
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I’m told by a good source a 6 cent size #6 washer in place of the bottom nut gets you 3.5 pounds
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  #11  
Old 05-09-2018, 7:27 PM
lordmorgul lordmorgul is offline
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Quote:
Originally Posted by roostersgt View Post
I’m told by a good source a 6 cent size #6 washer in place of the bottom nut gets you 3.5 pounds


That is a reasonable alternative, but not a 2.0lb target trigger.


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  #12  
Old 05-14-2018, 8:58 PM
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Default TC Compass Modifications

I installed the mcarbo spring set and mine is under 3 pound and passed “drop” test by hitting the stock hard with mallet.


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Last edited by jconfus; 05-14-2018 at 9:00 PM..
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  #13  
Old 05-26-2018, 8:35 PM
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Thanks Lordmorgul for the info. Any updates on the shooting and accuracy ?
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Old 07-07-2018, 9:46 AM
lordmorgul lordmorgul is offline
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Originally Posted by Flouncer View Post
Thanks Lordmorgul for the info. Any updates on the shooting and accuracy ?


Sadly not yet! It hasn’t made the trip to the range since I started doing the High Power comp with my AR this summer and have very limited range time due to work. Soon I hope to get a few minutes end of one range day early August, working all weekends in July :-/


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Old 07-06-2018, 12:38 PM
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I fixed the trigger on my .223 Compass with a Winchester Model 70 target trigger spring(straight replacement,no gunsmithing) that i bought online from Ernie's Gunsmithing....cost was $6.95 i think
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Old 11-20-2019, 5:21 PM
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