Stiffening a Norinco M14 Plastic Stock

theDuck

CGN frequent flyer
Rating - 100%
64   0   0
There was a thread a bit ago about the flexyness of the Norinco M14/M305 plastic stocks. Someone had mentioned somewhere about using arrows to strengthen M14 stocks. The young lad and I tried flexing one and sure enough they flex and twist though with some effort. Being bored and having tools at our disposal (never a good thing) we went about using carbon fibre arrows and JB weld to stiffen the stock. It was the perfect father son project. He did the gouging and fitting while I roasted chestnuts on the shop wood stove and ate them. Plus the best thing. The project involved firearms:D.
One section arrow shaft was used on the right side and two, one above the other, on the left. We whittled out grooves in the stock ribs down low and used short pieces zig zag on the bottom. Whittling the rib notches was done with a round rasp from the front end and a wood chisel. Be careful with the chisel as you are using it with force in an awkward way. Slip and you may stab yourself.
JB Kwik weld was used to hold the parts in and then regular JB weld put on later to blend the works together. Afterward, much fitting was done to get the barreled action in and functioning. The arrows could not go to the front end as they interfered with the gas assembly. We had to start the second rib back that is behind the front swivel rivets. At the back end the arrows butted up against the stock at the mag well.
It isn't pretty and way too much JB weld was gooped in. Hence the need for much fitting to make the action work. Learn from our error. I would use less next time though a round rasp is your friend. Also sand the area you are applying the epoxy to in order to rough it up and give the epoxy something to grip to. Sand each layer of JB weld if you are doing layers so the next batch has something to grab on to.
The arrows were cut with a Dremmel and cutting disc. The stiffer the arrow the better. Wear a full face shield when doing so and try not to breath the fibers. The young lad is a very good archer and has respect for the damage a carbon fibre arrow can do if they shatter so I take the hint about safety from him.
Did it stiffen the forward end of the stock? Sure did. It took about 75% of the twist and flex out best we can figure by using our bare hands to twist and bend it.. Will it make it shoot better? Remains to be seen. Did it add weight? Yup. Why did we do it? Because some of our imaginary friends on the interwebs complained about a flexy stock so we set about to find a solution for a problem that we don't care about:). If we destroyed the stock it wouldn't matter. The Chinese are making them every day:p.
No doubt there are others who have stiffened a plastic Norinco M14 stock and will have a better way. Please chime in. This is a simple method used that is easy for someone without a workshop and machinery to do.
fullforearm_zps21b97960.jpg

Closer view showing how messy it was done.
forearmclose_zpsff7c8462.jpg
 
I did essentially the same thing. I used an arrow shaft on each side, However I did more clearancing around the front sing attachment points and was able to leave the shafts the full length of the fore end. It stiffened the stock up a lot. 75% or better via the hand twisting method you describe.
Did it shoot better? Yah maybe a bit. like .25 moa better. Maybe.
But it gave me something to do, and it certainly doesnt shoot worse than it did before.
 
Sounds like a nice project to work on with family! But yep.. JB weld sure is not pretty..

I did a very similar project on my USGI stock, but I used 2 stainless steel rods about 3/8 in thickness that ran the length of the forend. Placed on both sides and then I layered 7 lays of fiberglass and resin ontop and flowing up the side of the forearm. Using a plastic bag as a release agent I then placed my rifle back in the stock to allow it to mold the fiberglass. Then with a little sanding to make sure it's still free floating it now is incredibly stiff from lateral twist.

All this work did add weight however, it did improve accuracy.
 
That's very good to know Spearhunter, thanks! I had to JB weld the selector switch cut out on my stock and in hind sight that would have been nice to be able to push more JB in to the air pockets.
 
I took the rifle to the range today to dial in the iron sights and see if stiffening the forestock did anything. I had to move the front sight over to the left so it overhangs the base a tiny bit. Didn't have to do that before playing with the forestock. Anyway here is the group size at 100M from sandbags from a bench using issue Norinco battle sights, my mid 50's eyes, overcast sky and Hornady 150gr BTSP and 43gr. of IMR4064 chronographed at 2600fps. This is 6 shots and is the same load I used before stiffening the forestock.
I figure the group shrank 1.5" from what it was before the stiffening, all things being the same. Once dialed in it dropped in the shots consistently. Did stiffening the forearm help? In this case it sure did. However YMMV. I was going to chop the stock and add a telescoping buttstock as this is my CQB rifle. I'm not touching a thing;). Looks like I'll need to get a shorty to chop the stock on :D. Damn these M14 are addicting!
group.jpg
 
Last edited:
theDuck;8106891 I figure the group shrank 1.5" from before all things except the stiffening being the same.[/QUOTE said:
I'm sorry i don't understand this bit - did the other things you did previously (such as??) shrink the group 1.5", or did the stock stiffening shrink the group 1.5"

Thanks for the range report.
 
I haven't bedded an action so can't help there. The forend was strngthened as I described. Bedding an action is something I'd like to learn too and I believe there is info in the stickies.
 
I haven't bedded an action so can't help there. The forend was strngthened as I described. Bedding an action is something I'd like to learn too and I believe there is info in the stickies.

Do you have pics of the process? I got the high temp JB Weld putty will that work just well or should the liquid/goo stuff be better? Thanks
 
The only pictures I have are what you see. I used JB Kwick Weld to glue things in then the regular to fill in and add to it. Sand the area you wish to put the epoxy to with coarse like 80 grit sand pape to get it to stick to the stock. The stock is rather slick. I did the sides then the bottom. I'd do the bottom first then the sides. I Kwick welded the arrows in first then did each side with the regular weld. You have to lay the stock on its side to stop it all from flowing into the bottom. Actually you could just use the kwick weld and get the job done faster in hind sight. It takes about 20 minutes till it doesn't flow.
 
The only pictures I have are what you see. I used JB Kwick Weld to glue things in then the regular to fill in and add to it. Sand the area you wish to put the epoxy to with coarse like 80 grit sand pape to get it to stick to the stock. The stock is rather slick. I did the sides then the bottom. I'd do the bottom first then the sides. I Kwick welded the arrows in first then did each side with the regular weld. You have to lay the stock on its side to stop it all from flowing into the bottom. Actually you could just use the kwick weld and get the job done faster in hind sight. It takes about 20 minutes till it doesn't flow.

Thanks for the walk thru. Something I never understood with bedding/stiffening is how thick do you know how to make the walls of the stock? Do you just keep adding layers just before its too thick to put the action in?
 
You can gouge out the ribs in the forearm for the arrows then tape them in to see if there is interference with the barreled action. Put the action in without the handguard so you can look in. Rack the action and see if there will be any interference with the op rod. You are not adding layers like it is fibreglass. You are gooping in long hollow stiffeners. One go does it.
When it is all dry you will have to sand/scrape/dremel to allow the action in and to operate freely. Once you get started you simply wing it and discover as you go along. You aren't working to 0.0001". If you mess it up don't worry. The Chinese are making new stocks every day:p.
 
I took the rifle to the range today to dial in the iron sights and see if stiffening the forestock did anything. I had to move the front sight over to the left so it overhangs the base a tiny bit. Didn't have to do that before playing with the forestock. Anyway here is the group size at 100M from sandbags from a bench using issue Norinco battle sights, my mid 50's eyes, overcast sky and Hornady 150gr BTSP and 43gr. of IMR4064 chronographed at 2600fps. This is 6 shots and is the same load I used before stiffening the forestock.
I figure the group shrank 1.5" from what it was before the stiffening, all things being the same. Once dialed in it dropped in the shots consistently. Did stiffening the forearm help? In this case it sure did. However YMMV. I was going to chop the stock and add a telescoping buttstock as this is my CQB rifle. I'm not touching a thing;). Looks like I'll need to get a shorty to chop the stock on :D. Damn these M14 are addicting!
group.jpg
rn


Very nice work and a great result for a minimal investment. Gotta gve this a go meself.
 
I'm not going to guarantee this will make tighter groups but it seemed to work for me. It is one of those things that can't hurt. Kind of like carrying garlic to keep vampires away:).
 
What year of rifle is this? Have you tightened the gas assembly yet? You may be able to frankstein together a 1 inch gun if it's already shooting like that

fetchthemail.gif
 
The original owner had the rifle at a Hungry clinic. The gas cylinder lock was properly clocked and tight right from the high school shop class. This must be a Wednesday rifle. The flash hider is still welded as it didn't need to come off to tighten the gas cylinder. The action fits tight in the bedding. I've done 2 Hungry clinics and tweaked a couple of rifles so all I had to do was change out the op rod spring guide to one from S&J. It is a 2010. I use handloads as well.
I plan on putting a scope on it to rule out my crappy eyes to see how well it really does.
Now if I could do something with the slickness of the stock I'd be happy to use it in Service Rifle.
 
Back
Top Bottom