Type 81 SR Serious Quality Concern

The stock with its grip is only held on by a couple of pins through a little wooden tab? That is a pretty poor design.
 
Murray 3-D said:
Look like it just broke under basic stress to me.

No tangs, no laminate, no grip screws, no wedge effect, no excessive amounts of material. TI could indeed have a huge problem in their hands if this becomes common.
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How much stock goes into the receiver? it sure doesn't look like much. Really there is no grip screw? No way those will stay on over time if its less than a inch of meat holding on especially when its not inline with recoil!! Not Good!!
 
gristle111 said:
How much stock goes into the receiver? it sure doesn't look like much. Really there is no grip screw? No way those will stay on over time if its less than a inch of meat holding on especially when its not inline with recoil!! Not Good!!
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Maybe an half inch, which is enough, but unfortunately due to how the receiver is cut, nothing but that upper pin about 3/16" underneath the surface of the wood holds the stock against that pivot force in the direction shown in the picture. I was expecting to find a bolt underneath the cap on the pistol grip that possibly strung up into the rear trunnion. But there's nothing. The only remaining structural support that is yet to be explored is the mystery plate riveted to inside bottom of the receiver, where the T-Nut wouldve went. Maybe that plate has a spar that protrudes into the meat of the pistol grip IDK. I havent removed the buttstock yet.
 
Murray 3-D said:
Maybe an half inch, which is enough, but unfortunately due to how the receiver is cut, nothing but that upper pin about 3/16" underneath the surface of the wood holds the stock against that pivot force in the direction shown in the picture. I was expecting to find a bolt underneath the cap on the pistol grip that possibly strung up into the rear trunnion. But there's nothing. The only remaining structural support that is yet to be explored is the mystery plate riveted to inside bottom of the receiver, where the T-Nut wouldve went. Maybe that plate has a spar that protrudes into the meat of the pistol grip IDK. I havent removed the buttstock yet.
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thanks for the info.. i was curious what happened to the nut inside bottom. still waiting for mine to show up..
 
I thought for sure they had a grip screw and something attaching into the rear trunion like the folding stock does... it doesnt even look like it has any overlap onto the rear trunion area, it just butts up flush.

I think an after market mod is in order lol... weld a tab onto the rear of the gun and put a cross pin into the stock.

Or maybe a angle tab with a 1.5 inch leg onto the top of the stock with a #10 wood screw
 
LordEvilPepper said:
I thought for sure they had a grip screw and something attaching into the rear trunion like the folding stock does... it doesnt even look like it has any overlap onto the rear trunion area, it just butts up flush.

I think an after market mod is in order lol... weld a tab onto the rear of the gun and put a cross pin into the stock.

Or maybe a angle tab with a 1.5 inch leg onto the top of the stock with a #10 wood screw
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I dont own the gun but couldnt one remove the bolt cover and bolt and put screw and washer into the stock where there are the two upper rivets
 
Fordtrucks said:
No an svd uses the bolt through where the pistol grip part is, not 2 pins horizontal this design is very weak even with laminate
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did you remove the one from the sr81? we have to compare with the ndm stock as they are really similar to the sr81 and the ndm one can take the svd polymer with no extra fittings.
 
SVD's like the NDM-86 I suspect have a much more elaborate rear trunnion then the Type 81 SR. IMO theres little to no design similarity's between the 2 stocks outside of the overall visual concept. Whats on the SR is very much proprietary and what the SR may very well need is a hole and lag bolt passing thru the rear trunnion down into the meat of the pistol grip. Its well enough fixed in place to handle all the other force vectors IMO. It just needs reinforcement for this final one.
 
Can-down said:
Well that answers that... I was wondering what the connection of the stock looked like.
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I always felt the mounting of the lmg stock and rifle fixed stock was pretty flimsy. Hell theres pictures of them with wire instead of pins. The folder is rock solid and attached to the riveted rear trunnion
 
Murray 3-D said:
SVD's like the NDM-86 I suspect have a much more elaborate rear trunnion then the Type 81 SR. IMO theres little to no design similarity's between the 2 stocks outside of the overall visual concept. Whats on the SR is very much proprietary and what the SR may very well need is a hole and lag bolt passing thru the rear trunnion down into the meat of the pistol grip. Its well enough fixed in place to handle all the other force vectors IMO. It just needs reinforcement for this final one.
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They will have to make the stock longer then and bring it all the way to the trigger guard
 
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