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View Full Version : New LMT M4 Upper Blemish - Cosmetic or Potential Problem?


SanSacto
05-22-2009, 12:13 PM
I am really excited that I just received my first AR-15 upper today! It has been a long wait. I ordered this LMT M4 upper in January, and it finally arrived! It has a great fit with my Stag Arms OLL, and overall I am very happy with it. I just need a few more parts and then I am done!

However, there is one blemish that I am concerned about. There is a small chip on the side at the rear of the upper receiver. I highlighted the the flaw I am concerned about with an arrow in the second and third pictures below (sorry about the phone camera pics!). It looks like a small chip or flaw in manufacturing on the side of the receiver. It runs about 1/16" wide from the rear of the receiver, although it runs about 1/2" vertically. In the middle of the flaw there is a tiny spot where the finish has also been damaged, this is approximately where the dots are pointing to.

Is this a cosmetic blemish or could it potentially be a problem? I ask because the the flaw is at a spot near where the upper and lower receivers meet, and I don't know if this could lead to problems in the future. Again, the blemish is on the outside of the upper receiver and not on the inside/rear where the upper actually meets the lower. It is on the side, and right now the upper and lower fit together great. So should I be concerned about this? Could this flaw potentially become a problem?

http://i558.photobucket.com/albums/ss22/DucketsCA/ar-1.jpg
http://i558.photobucket.com/albums/ss22/DucketsCA/ar-2b.jpg
http://i558.photobucket.com/albums/ss22/DucketsCA/ar-3b.jpg

DJMAN
05-22-2009, 12:21 PM
Be concerned. :eek: I'll take it. ;)

Black Majik
05-22-2009, 12:22 PM
Looks like just a cosmetic ding.

Jicko
05-22-2009, 12:26 PM
No worries...

If you are worry about those kinda little things.... you should never have gone with LMT (or Colt) etc... they worry about functions, not cosmetics...

Nothing a "Birchwood Casey Super Black Touch Up Pen Flat" cannot fix:
http://www.midwayusa.com/viewproduct/?productnumber=379148

http://www.midwayusa.com/midwayusa/staticpages/highres/379148.jpg

PS. you are in San Diego, PM me, I have that and I can help you FIX your little issue.... lol

Arteel
05-22-2009, 12:29 PM
Sharpie!!

Jicko
05-22-2009, 12:31 PM
Sharpie!!

Sharpie sucks.... sharpie rubs off.... and it has a gloss finish...

SanSacto
05-22-2009, 12:32 PM
Be concerned. :eek: I'll take it. ;)

Looks like just a cosmetic ding.

No worries...

If you are worry about those kinda little things.... you should never have gone with LMT (or Colt) etc... they worry about functions, not cosmetics...

Nothing a "Birchwood Casey Super Black Touch Up Pen Flat" cannot fix:
http://www.midwayusa.com/viewproduct/?productnumber=379148

PS. you are in San Diego, PM me, I have that and I can help you FIX your little issue.... lol

Sharpie!!

Sweet! This is exactly what I wanted to hear, I just needed a little assurance! I am not at all worried about cosmetic blemishes, so I do not care at all if that is the case. I just needed to know that it is not going to chip further or effect the functionality of the rifle. Thanks!

Teletiger7
05-22-2009, 12:33 PM
BirchWood casey also sells aluminum bluing liquid that works decently.

Jicko
05-22-2009, 12:37 PM
Sweet! This is exactly what I wanted to hear, I just needed a little assurance! I am not at all worried about cosmetic blemishes, so I do not care at all if that is the case. I just needed to know that it is not going to chip further or effect the functionality of the rifle. Thanks!

If you leave out your charging handle.... it actually will effect functionality of the rifle.

:rofl:

By the way, I think ASC(american shooting center) in kearny mesa carry that touch up pen too.... it totally worth putting it in your AR tool box.

xm177
05-22-2009, 12:41 PM
This might be an excuse to give it a Cerakote finish (maybe FDE). Adds identity to your rifle. Plus, when you scratch it up it will look even better.

SanSacto
05-22-2009, 12:58 PM
I just need a few more parts and then I am done!

If you leave out your charging handle.... it actually will effect functionality of the rifle.

:rofl:

By the way, I think ASC(american shooting center) in kearny mesa carry that touch up pen too.... it totally worth putting it in your AR tool box.

The charging handle is one of those few more parts that I was talking about, thanks though. But I will check out ASC for that tough up pen!

Jicko
05-22-2009, 12:59 PM
The charging handle is one of those few more parts that I was talking about, thanks though. But I will check out ASC for that tough up pen!

CH <- I have an extra, PM me.

armygunsmith
05-22-2009, 1:09 PM
Well at least you won't have to worry about that "first scratch" anymore. I say get out to the range and give the rifle some personality. :thumbsup:

cmace22
05-22-2009, 1:32 PM
LMT is not always the best looking girl on the block but she puts out every time!

Mine has some just like that. Its cosmetic, you are GTG.

Arteel
05-22-2009, 1:36 PM
You are right, it does rub off. BUT, I do prefer to use sharpie because it seemed like it covered the scratched area better than the birchwood casey stuff. When I used the touch up pen, I could still see the silver.

Either way, its an easy fix if you got a sharpie laying around the house. Or just forget about the blem and get more scratches.

Sharpie sucks.... sharpie rubs off.... and it has a gloss finish...

Black Majik
05-22-2009, 1:57 PM
BirchWood casey also sells aluminum bluing liquid that works decently.

This one actually worked really well for me touching up dings on my AR15 receiver. A toothpick dipped into this will make it almost unnoticeable.