AR15.Com Archives
 Refinishing question for XM-177E2
AbominableNo-Man  [Team Member]
8/12/2007 4:22:41 AM
When I get them together, I would like to have all the major parts for my upcoming XM-177E2 quasi clone (upper, lower, buttstock) sent in to have a uniform Colt gray finish on them so they match. I also wanted to see who could mill off the bayonet lug (all the pics of XM-177's didn't have them) and possibly install the grenade ring.

Any suggestions who to take this to?
myitinaw  [Team Member]
8/12/2007 5:46:45 AM
US Anodizing

AR15Barrels
VAAR  [Team Member]
8/12/2007 7:52:10 AM

Originally Posted By myitinaw:
US Anodizing

AR15Barrels


+1
TacticalOpsAR  [Member]
8/12/2007 12:41:27 PM
SBR or 16"? if it is a SBR the grenade ring just fits between your lock washer and flash hider. If it is going to be pinned on for 16" send it to AR15barrels.com to get perm attached. he can also remove the bayo lug

Tomovich  [Team Member]
8/12/2007 1:05:10 PM
Interesting. I didn't know that about the bayo lug. No bayo lug on an XM177 huh?

Also, I thought I read somewhere that a XM177 (not an E1 or E2 but a plain ol' slick sided 177) didn't have grenade rings either?? Just a mod and lock washer, No??
joelad  [Team Member]
8/12/2007 3:09:06 PM
I don't see a grenade ring here.



That doesn't they didn't have greande rings.
Tomovich  [Team Member]
8/12/2007 3:29:40 PM




engineer2001  [Team Member]
8/12/2007 4:08:53 PM

Originally Posted By AbominableNo-Man:
When I get them together, I would like to have all the major parts for my upcoming XM-177E2 quasi clone (upper, lower, buttstock) sent in to have a uniform Colt gray finish on them so they match.


Anyone know the answer to that one above? I just bought a nice Colt M16 upper, and I'd like to match it to a new lower myself. It would be nice if it could be the new blacker color or I could send off my lower to get the older grayish color for it. I don't even know where to look for that kind of service.

I'd prefer not to Norrell's gray moly coat it myself, since I have no airbrush tools or skills, and I want it to look nice.
uxb  [Team Member]
8/12/2007 4:23:11 PM
My upper looked like this. It was arsenal refinished and pretty beat-up.



The lower was Lauer Duracoated. It was then modified from an A2 lower receiver to an XM receiver with partial fence. Some parts were bare aluminum, some parts were anodized, and some parts were still covered with Duracoat.



I sent them to Victor and specified early Colt XM grey.

This is the completed work upon return.



Obviously, since I had bare aluminum on the lower, I didn't want to use Norrell's. And the anodizing will wear normally with age and offer protection that Norrells will not.

I can say without reservation that sending your upper and lower to Victor at US Anodizing for a color match will be a choice you will not regret.

And if you have a good upper or lower and want a color match on the other, he can do that too.

I had a NOS Colt "CH"-marked upper for my 603 build and bought a NDS A1 lower "in the white". I sent the upper to Victor and said "Match the lower to the upper". He did nothing to the upper other than use it as a color reference.

Here is the match:



I'll be sending my 601 upper with my NDS 601 lower this week (as well as a buffer tube and trigger guard) to be color matched to the upper. This is what it looks like now:



I'll post "after" pics when it gets back.

I am not an employee or associated with US Anodizing in any way, except being a satisfied customer.

US Anodizing
45Bravo  [Member]
8/12/2007 4:29:18 PM

Originally Posted By Tomovich:
Interesting. I didn't know that about the bayo lug. No bayo lug on an XM177 huh?

Also, I thought I read somewhere that a XM177 (not an E1 or E2 but a plain ol' slick sided 177) didn't have grenade rings either?? Just a mod and lock washer, No??


The XM177 (Model 609) does not have a grenade ring and has a 10 inch barrel. The XM177E2 (Model 639) does have a grenade ring and an 11.5 inch barrel. The extra 1.5 inches of barrel and ring were added to allow attachment of the XM148 grenade launcher that predates the M203. Neither have a bayonet lug.

Tomovich  [Team Member]
8/12/2007 4:54:30 PM

Originally Posted By 45Bravo:
The XM177 (Model 609) does not have a grenade ring and has a 10 inch barrel. The XM177E2 (Model 639) does have a grenade ring and an 11.5 inch barrel. The extra 1.5 inches of barrel and ring were added to allow attachment of the XM148 grenade launcher that predates the M203. Neither have a bayonet lug.


Thanks for the enlightenment!

NOW......are your "correct" moderators and duckbills done yet??
uxb  [Team Member]
8/12/2007 5:08:09 PM
The grenade ring also allowed for use of friction-fit grenades that pre-dated the XM148.

45Bravo  [Member]
8/12/2007 5:08:18 PM


Originally Posted By uxb:
The grenade ring also allowed for use of friction-fit grenades that pre-dated the XM148.

www.fototime.com/A76F10259C5A146/standard.jpg


Any better photos of that particular type of muzzle launched grenade? It's not like most that I'm familiar with.

Working on Duckbills, correct moderators are still in the works but no time soon unfortunately.
Trumpet  [Team Member]
8/12/2007 5:12:58 PM
I'm going to piggy back on this one with a question from my other post...

Now, I was wondering how to finish it when it's all built. If the anodizing on the receiver is in good shape but doesn't match the barrel (which I assume will be reparked after having the fake moderator mounted) can it be parked? Or will some sort of Norrell's type of finish do (assuming the anodizing is in good shape)? I'm not looking for a Colt Grey, I'm just looking for standard black since it's going on top of my Ameetec lower. If it needs to be reanodized (how do I determine that anyway?), who to do it, how much does it typically cost, etc?

Also, for the grenade ring, how does the barrel get machined and how is it mounted?
TacticalOpsAR  [Member]
8/12/2007 5:24:50 PM
the grenade ring mounts just like a standard lock washer or crush washer. It slides over the threads and the flash hider holds it in place.

the M203 cut is machined into an M4 profile barrel, the XM177 ring is like an oversized washer.
45Bravo  [Member]
8/12/2007 5:29:27 PM
The barrel is threaded and the ring sits on a shoulder just as a lockwasher does on a full length barrel.

Though not the correct barrel, this represents what the threads running up to the shoulder would look like. I'll see if I can get some better pictures later.



This is a photo of the grenade ring from different angles. Notice the steps on the inside. The first step in from the outside is for a lip or finger that protrudes from the XM148 launcher frame or receiver. The innermost ring is where the grenade ring sits on top of the barrel.



I have a really good photo of an XM148 on an XM177E2 on my computer. As soon as I can get it loaded I'll post it.