My New 7.62 Firearms Bolt

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sobo4303

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Smoky Lake, Alberta
Well folks, way back in March I ordered a 7.62 Bolt. At that time, I posted that it had arrived (at least THOUGHT it did), as I was holding a post office parcel slip.

Long story short, it arrived today, in the mail, one day before the Postie strike too. Yeppers, it looks like a beauty too. Now for those of you whom thought that they had to send in pieces, well, as I ordered it, it was fully assembled. Yes, that's right, fully assembled. And I live in Alberta, so it's all legal and stuff.

I will post pics of my targets when I install it.

Cheers!:D
 
I waited longer and my bolt came completely stripped. It has no firing pin, no extractor, etc.. So you paid $150 and it was "fully" assembled? Is that correct?
 
Pics??...For a bolt? nah..it looks like any old bolt, except painted black.

I ordered a fully assembled bolt. $235.00 That includes, firing pin, springs, etc. Fully complete....That is exactly what they sent me. I had to phone them a couple times to remind them that they did accept the Visa and so they should deliver promptly.

The bolt requires some lapping to install. Going to do that on the weekend. I'm kinda excited now. I gotta go watch Band of Brothers or the Pacific. :p :D
 
"...Did it just drop in..." Bolts are not drop in parts. Any new bolt requires fitting for headspace. Lapping doesn't do that.
 
sunray said:
"...Did it just drop in..." Bolts are not drop in parts. Any new bolt requires fitting for headspace. Lapping doesn't do that.
Click to expand...

Lapping will only improve the percentage contact at the lugs or correct for a thou or two of tight fit on a GO gauge.

In MOST cases, dropping in a bolt built to GI spec will result in headspace within the acceptable range. If not, you either need a different bolt or to ream the chamber deeper - not something you can realistically do on a Norinco barrel as they are chrome lined.
 
So whats the story? I'm confused. Is it legal to import your bolt Or did you have to get a permit? I thought bolts were over the dollar limit. Are any canadian companies importing importing 7.62 parts for resale? thanks
 
pinkfloyd said:
So whats the story? I'm confused. Is it legal to import your bolt Or did you have to get a permit? I thought bolts were over the dollar limit. Are any canadian companies importing importing 7.62 parts for resale? thanks
Click to expand...

I did not obtain any permits. I just ordered a fully assembled bolt, paid with Visa, made several "reminder" calls to 7.62 and voila....about 2.5 months later, a fully assembled bolt showed up in my mailbox.
 
Thanks sobo. I ordrerd one last winter but never heard anything back. thought they decided not to ship to canada. Will try again.
 
I had to keep phoning them. They (7.62) are not that particularly organized. They were always polite and courteous, just not too organized. They had a whole schwack of bolts go out a few weeks ago (mine included). When I ordered, there were some available, but mine went through in (what I understand) the second batch of bolt orders.

And yes, they indicated that there are quite a few Canadian orders.
 
Claven2 said:
Lapping will only improve the percentage contact at the lugs or correct for a thou or two of tight fit on a GO gauge.

In MOST cases, dropping in a bolt built to GI spec will result in headspace within the acceptable range. If not, you either need a different bolt or to ream the chamber deeper - not something you can realistically do on a Norinco barrel as they are chrome lined.
Click to expand...

Claven, my bolt is similar to how you described your trw bolt and how it was tight. Did you have to do any other work other than lapping? Mine starts to make contact with the lugs on the receiver, but is very tight - with no guage in chamber.

Just wondering what next step is.
 
If you don't have gauges, stop. Either bring the gun to an M14 gunmith or buy the proper gauges before proceeding.

The bolt should either close on an empty chamber, or be VERY close to closing (as in a a few thou from contacting under the right lug). If it is tighter, you need a new barrel or a new bolt. Lapping more than that will cut through the hard skin on either the bolt or receiver.

Lapping for headspace should only be done when headspace is out just a few thou on the GO gauge or to correct a percent contact issue between the lugs and the receiver.
 
Just a quick question sobo4303...
The bolt is stripped when you are checking the headspace right?
If yes and the no-go gauge is tight when closing then only use 308 commercial ammo and swap out to your old bolt for regular 7.62.
If the bolt isn't stripped when checking headspace then your readings will be out to lunch.
;)
 
Thanks guys.

Yes I have gauges and yes, I stripped the bolt when using. I made a tensioning device as shown in Claven's photos way back when. Prior to starting the lapping I noted Claven2's comment regarding dropping in the new bolt and his previous comment regarding his TRW bolt not closing prior to lapping. I just wanted to verify that my situation is the same, or if more than a couple thou is required to get the bolt to seat, it will be sent out to someone whom knows more about what they are doing than I do, or I will wait until Hungry comes to Alberta again. I am kinda anal about double and triple checking before I commence projects such as this.

However, given what I have read, I will take a few more measurements and dig out my valve grinding compound (if I have any left) and commence to go to work.
 
Good to hear that these 762mm bolts are tight when new. I just swapped my barrel out for a Criterion 18.5" that's finish chambered/chromed. My TRW bolt, which was a super tight fit with my Norc barrel, now has some wobble when closed. Already got a new gas system from 762mm which fit great, so guess it's time to order a bolt from them as well.
 
my advice is to contact 7.62 for specs on how deep the outer layer of hardening goes. this will also give you an idea on how much you can lap..... if you are truly concerned.

I've installed 2 of these new bolts over the past month or so and both went into chinese barrelled actions. One a 2005 marstar rifle and the other a brand new 2009 poly.

the bolts lapped in to 1.631" or .308 GO plus 1 thou. Adding the 1 thou is a standard practice of mine for a match semi auto chamber.
it was not possible to further lap the 3 or 4 thou needed to reach 7.62 nato match (1.6345) on either rifle. An aftermarket short chambered barrel would required to achieve nato headspace and this is the common case with installing a U.S. made bolt , be it usgi or other, to a chinese rifle, if the desire is to reach nato chamber specs.

while the job can be performed by the "meticulous" and well prepared do it yerselfer..... some piece of mind may come by sending it to a professional.
 
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