Hello fellow M14s enthusiasts.So I own a few of these fine rifles and to me the receivers all appear the same.I have not done any measuring etc to see which are closest to proper specs etc.They are all the 2007 stamp series.So how would one decide which receiver to send in the M14 Doc to get it installed and headspace set up properly (chamber recut after barrel install). I have one USGI bolt I could use but prefer to use the original Norc one (as I have a couple of spares) and the usgi bolt could be used to save a out of headspaced receiver barrel combo. Thanks
If new barrel ordered?How to decide which receiver to send?
- Thread starter millwright
- Start date
Look on the right side of the receiver ring. You might have to strip receiver down by removing the bolt and op rod. See that little set screw? Yeah, it is a royal PITA to remove. But on my 2009 Poly, it came out really quickly. GREEN LIGHT! 
On my 2007 Norc M14 that's got a Douglas Hvy NM Stainless barrel, I just drilled out what I could of that set screw.
Sounds to me that either of your 2007 M14 Norc receivers will work.
Keep us posted on what / which receiver gets the upgrade....
Cheers,
Barney
On my 2007 Norc M14 that's got a Douglas Hvy NM Stainless barrel, I just drilled out what I could of that set screw.
Sounds to me that either of your 2007 M14 Norc receivers will work.
Keep us posted on what / which receiver gets the upgrade....
Cheers,
Barney
Good Morning Barney. Ahh the screw thing.I have been both blessed and cursed with this simple machine. Easiest one was a over tourqued barrel/receiver combo.Both came apart like a hot knife thru butter.Never took off a barrel by hand before.Needles to say it went back to the distributor. The hardest one was at a M14Doc clinic when he was still on the lower rainland.Glad he was there to guide me along. Being a millwright has exposed me to many hard to remove fasteners so one picks up a few tricks along the way.Later
the beauty of the short chamber barrel conversion is that one can ream the chambr to suit bolt and barrel desired for use...... this has certain limitations and rifles with bolts that measure headspace exceeding 1.642" should not be considered optimum for this swap.
Most norcs in the 2007 vintage run 1.639- ish so should be okay but here is where maybe using that stashed away usgi would be preferred..... depending if you want your chamber to spec out at Nato or the tighter .308 (keep the norc bolt for nato and perhaps the usgi for .308 depth chamber.
99.9% of the newer 2009 vintage norcs and polys are running headspace in the 1.638" measurement according to what is coming across my bench. In my mind these are perfect candidates for installing a short chambered barrel using your existing bolt/receiver combo.
as a bit of a side track..... I had this very old receiver, chinese i think. It had nevr been assembled with parts, essentially it was brand new all around, not a take off, and had been sitting in my stash for a while. with it's un stamped/marked exterior and only a 4 digit number under the stock line, I was going to save it for a special build. Well, I couldn't wait and threaded up a recent import parts kit to it and had to lap the bolt into place..... which was very surprising to me. headspace after brief lapping..... 1.631" essentially a match chamber.....
the newer import parts seem to spec out a little better as far as bolt/barrel/receiver fit goes.
all said, I would use whatevr receiver you want of any of the import years.
these chambers on the barrels i am ordering have been requestd to be made .010" short
Most norcs in the 2007 vintage run 1.639- ish so should be okay but here is where maybe using that stashed away usgi would be preferred..... depending if you want your chamber to spec out at Nato or the tighter .308 (keep the norc bolt for nato and perhaps the usgi for .308 depth chamber.
99.9% of the newer 2009 vintage norcs and polys are running headspace in the 1.638" measurement according to what is coming across my bench. In my mind these are perfect candidates for installing a short chambered barrel using your existing bolt/receiver combo.
as a bit of a side track..... I had this very old receiver, chinese i think. It had nevr been assembled with parts, essentially it was brand new all around, not a take off, and had been sitting in my stash for a while. with it's un stamped/marked exterior and only a 4 digit number under the stock line, I was going to save it for a special build. Well, I couldn't wait and threaded up a recent import parts kit to it and had to lap the bolt into place..... which was very surprising to me. headspace after brief lapping..... 1.631" essentially a match chamber.....
the newer import parts seem to spec out a little better as far as bolt/barrel/receiver fit goes.
all said, I would use whatevr receiver you want of any of the import years.
these chambers on the barrels i am ordering have been requestd to be made .010" short
