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2/2/2009 11:16:00 PM EDT
I just bought a New Smith and Wesson 5.45 x 39 upper.  I just finished putting together a lower, and when I tried to put the upper on, the carrier was sticking out of the end of the upper preventing the upper/lower from locking up.  

Removing the upper it looks like the carrier is sticking out of the receiver about 1/8 of an inch.  I tried tapping the carrier with the palm of my hand to seat it but to no avail it wouldn't go any farther forward.  I removed the bolt and firing pin assembly as I thought for some reason this could be preventing the closing of the Bolt/carrier group.  

The carrier will not Seat all the way into the receiver.  Looking in it looks like there is about a 1/8 gap in front also between the carrier and chamber, so I am pretty sure the gas tube was installed to far back.

Is there a remedy for this???

The Upper is FREAKIN BRAND NEW, and was set up wrong.  Do you think I should call smith and send it back to them???

Or are there other options??

Thanks

FIXED THE PROBLEM!  Thanks to all those who helped.
2/3/2009 12:57:57 AM EDT
[#1]
Does it close with the carrier removed?
Is the stock tube screwed in past the lower at the top inside edge of the lower?
2/3/2009 1:45:19 AM EDT
[#2]
Quoted:
Do you think I should call smith and send it back to them???


Yes!!!!
And when you have them on the phone, ask them what mags have been tested with the upper/rifle to work 100% as well.
2/3/2009 5:26:26 AM EDT
[#3]
Post pictures from the bottom side of the upper looking into the receiver and also from the rear looking forward.
2/3/2009 1:45:50 PM EDT
[#4]
I figured it out.  I pulled my other Ar-15 apart.  A standard gas tube protrudes about 7/8 of an inch down into the receiver.  In the Smith and Wesson Upper that I bought, the Gas tube protrudes about 1 1/8 inches into the receiver accounting for the bolt not closing.  Guess I am shipping my BRAND Fing NEW upper back to Smith, as I guess they don't know how to build an Upper.

What do you think I should ask for, besides shipping both ways????
2/3/2009 1:48:46 PM EDT
[#5]
Can you move the gas tube by hand? Sounds like the tube is not as far forward as it should be, and the roll pin is stopping it from moving forward instead of being inside the hole in the gas tube.
2/3/2009 1:55:19 PM EDT
[#6]
How do you remove the pin and remount it??
2/3/2009 1:57:41 PM EDT
[#7]
87GN,


THANK YOU!!!!!!!!

They missed the Gas Tube hole with the Roll Pin!!!!!   IDIOTS!!!!!!!

I will pop the roll pin out and remount it.  Now I just have to find a Punch small enough.

2/3/2009 3:13:16 PM EDT
[#8]
Glad it is a simple fix for you.

So where did you find the upper?
2/3/2009 3:25:04 PM EDT
[#9]
Gun show in Kalispell Montana for $600
2/3/2009 5:36:58 PM EDT
[#10]
Quoted:
87GN,


THANK YOU!!!!!!!!

They missed the Gas Tube hole with the Roll Pin!!!!!   IDIOTS!!!!!!!

I will pop the roll pin out and remount it.  Now I just have to find a Punch small enough.



Glad to hear that you won't have to deal with sending it back and forth.

Let us know how it shoots.
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