M305 USGI Stock

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Buick

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So I've just received my used USGI stock from TreelineM14. The rifle appears to fit all right. The trigger guard is a little tight when I go to lock it during reassembly.

I did encounter a problem that I've read about on here before... because of the changed shape of the new stock relative to the old Norinco plastic one, the hammer cannot move far enough to the rear to lock back. Instead, it follows the bolt forward when I manipulate the charging handle after a dry-fire while holding the trigger.

From my research on CGN it would appear the solution is to plane the small, recessed area at the base of the pistol grip, where the trigger group sits. This will allow the trigger group to sit higher, giving the hammer more clearance (and hopefully enough space to lock back).

I am seeking the advice of individuals who have done this before; I'm interested specifically in how much material needs to be planed, what tools you used and anything else I should keep in mind while doing this.

Suggestions for further modifications to the USGI stock for the purpose of better function are also welcome. :)

Thanks!

EDIT: Seems the upper buttplate screw from my Norinco stock does not fit the synthetic USGI stock. Anyone know what size screw it requires?
 
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For the screw, most of us just hit up the hardware store for a #10 sized nut and taper head machine screw. You'll notice a small recess where the nut goes. I epoxy mine in place , the nut that is. Light coat of oil on screw so it doesn't seize. Once it's set, undo screw and voila, assemble buttplate.

As for the trigger bearing pads, there are 3, the area under the rear of trigger group AND whatever comes off there must also come off the area that the trigger group "wings" sit or forward pads. Even removal is semi critical to keep trigger group parallel to action. Work slow, little bit at a time till hammer passes the test.
I "think" this is detailed in the stickies at top of this forum.
 
Buick, give us some details on the stocks from treeline. I see them listed as excellent condition and brown painted. The one in the picture looks raw fiberglass.

Regards. RTS
 
i had the same problem with mine in a vltor stock trigger (modified USGI). if you look at the mating surface of the trigger, it may be slightly bent. i had to tweek the surface of trigger. now it works perfect
 
RememberTheSomme said:
Buick, give us some details on the stocks from treeline. I see them listed as excellent condition and brown painted. The one in the picture looks raw fiberglass.

Regards. RTS
Click to expand...

Certainly. There are scrapes over one side of my stock, but the checkering is near 100% and the brown paint has virtually no wear. It appears the stock was brown and then painted brown again by the previous user. The stocks do not come with a buttplate.
 
The cool thing about fiberglass stocks is it is so easy to repair, refinish. Even small cracks can be repaired to last a lifetime.
For filling gouges, scrapes ect, pick up some GOOP marine epoxy paste at a marine shop or RONA. This particular epoxy paste is easy to work with, easy to trowel into fine scratches and deeper gouges all the same. Once it begins to set it is easily finger molded with a wet finger. Sands out extremely well too.
I've used it on a few hundred USGI fiberglasss stocks and have had them look and perform as new.
 
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