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gcw16
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Posted: 11/27/2009 4:24:51 PM
I went to Centerfire today and picked up a lower. As the previous poster said, they only have the forged ones in stock at this time. It looks good to me but I am no expert. Has anyone done a build with a forged TNW receiver yet?
Warhawk
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Posted: 11/27/2009 11:13:28 PM
Built up my 50 Beowulf on a billet TNW lower. Pics are in the AR Variants forum.

The only problem I had was that the bolt stop pin was too big, A couple of minutes with a drill bit to clean out the finish and open the holes up a bit and it was good to go. The pin may have been oversize, but I didn't have a spare to try.

I've tried to see things from the liberal point of view ... but I'm just not flexible enough to get my head up my ass.
wrenchmonkey
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Posted: 12/2/2009 1:18:14 AM
For those who care, it sounds like Centerfire got more in stock today. Looks like the price went up by 10 bucks. Still a steal!
kmcgillen
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Posted: 12/8/2009 11:30:42 AM
they are back ordered again on uppers. Should be good at end of week they said.
localizer11
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Posted: 12/8/2009 5:07:50 PM
I put my TNW lower together last night using a Doublestar LPK. This was my 3rd lower build and most difficult. The fist issue was that the safety selector holes were just a hair too small. I opened them up using a small dremel sanding drum. The next problem was the grip screw. I had to cut about a 1/4 inch off to make it work. The last problem was the magazine catch. The front of it binds in the receiver when the mag catch button is pushed. I'm still working on this one.

Overall, I think the TNW lowers are a good buy. Just be prepared for some extra work during assembly.
wrenchmonkey
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Posted: 12/8/2009 6:58:05 PM
Also thought I'd note that the uppers have been dropped by $30. They were $99, now $69.
kmcgillen
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Posted: 12/9/2009 6:15:14 PM
[Last Edit: 12/9/2009 6:17:02 PM by kmcgillen]
They said uppers are in final phase and will be in friday. They are shipping on monday. I went and bought an upper locally and may just cancel this order. I was thinking of keeping it for another build, but if it is around i will do another build
forever4
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Posted: 12/11/2009 11:19:57 AM
Originally Posted By localizer11:
I put my TNW lower together last night using a Doublestar LPK. This was my 3rd lower build and most difficult. The fist issue was that the safety selector holes were just a hair too small. I opened them up using a small dremel sanding drum. The next problem was the grip screw. I had to cut about a 1/4 inch off to make it work. The last problem was the magazine catch. The front of it binds in the receiver when the mag catch button is pushed. I'm still working on this one.

Overall, I think the TNW lowers are a good buy. Just be prepared for some extra work during assembly.


Yes, I had the same problems with mine. A correctly sized drill bit took care of the safety hole. I put a lock washer under the head of the grip screw, and the safety did bind and took some working back and forth, some lube and a very careful adjustment to get it right.

For $40 more I can get a RRA that is perfect. I think I will stick to "brand name" lowers. I did want one billet one to play with so I have no regrets.
An Army Veteran and proud of it. Long time NRA member and you should be too!
Wils91
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Posted: 12/14/2009 11:00:34 PM
i just received my stripped billet upper today. they included a cleaning kit for an AMD 64 i think for some reason?

anyway, a couple issues i have with the upper.

# 1
the holes for the ejection port cover pin are too small. i had to drill out the front one with a 1/8" drill bit and take some emery cloth to the pin itself along with greasing it up to get it through the front one, the rear seemed to be a little better. but after drilling and giving the pin some gentle encouragement with a rubber mallet it went it. but i hope i don't ever have to take it out cause i don't think it's going anywhere.

# 2
the rail on top of the receiver is higher than the rail on my YHM FF handguards. it not much, but its enough that it will make tightening the Jam Nut while keeping it straight a pain in the ass. ( i'm still waiting on my barrel, but just mocking it up showed me) i'll have to rig something up with some scope rings, tape, and dowel rod i guess.

other than those things, the receiver itself is very nice. the finish is smooth. i was worried about it being gritty because the pictures made it look that way.
i'm probably going to be picking up a matching lower soon, but hopefully i won't need to do any home milling on it. just have to wait and see.
LtBlue425
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Posted: 12/15/2009 12:23:36 AM
I don't have pics yet but my upper is beautiful, smooth, black, a work of art. The lower's anodizing looks gray, dull, lifeless. But I've got the lower assembled with a Double Star kit and have been using it. Everything went together perfectly except I had to find a shorter screw for the grip. Not a problem in my shop or garage.

Would I buy another? Probably (depending on price) but it'd be nice if the lower matched the upper then it'd really be a gorgeous unit. Actually the rough looking lower looks like my two RRA lowers. Last I looked the uppers were selling very cheap. Likely pick another upper at those prices.

I wonder if the difference can be explained by different aluminum alloys used or maybe a different batch of anodizing?
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Mateba
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Posted: 12/17/2009 2:15:32 AM
No problems with the safety selector with mine. Thread is shallow for the grip screw though, and the mag catch is tight but no biggie.
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iNeXile556
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Posted: 12/19/2009 9:38:39 AM

Originally Posted By TGrant:
Originally Posted By Desert__Punk:
How did they do the magwell? EDM?


Thats pretty much the only way to do it. Definately the cheapest way.
You really don't have knowledge of machining do you? EDM is the most expensive way to do a magwell which is why few manufacturers use it.

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wrenchmonkey
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Posted: 12/19/2009 8:11:54 PM
Originally Posted By iNeXile556:

Originally Posted By TGrant:
Originally Posted By Desert__Punk:
How did they do the magwell? EDM?


Thats pretty much the only way to do it. Definately the cheapest way.
You really don't have knowledge of machining do you? EDM is the most expensive way to do a magwell which is why few manufacturers use it.



Show me a major manufacturer who doesn't.
iNeXile556
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Posted: 12/20/2009 6:22:41 PM
[Last Edit: 12/20/2009 8:02:05 PM by iNeXile556]

Originally Posted By wrenchmonkey:
Originally Posted By iNeXile556:

Originally Posted By TGrant:
Originally Posted By Desert__Punk:
How did they do the magwell? EDM?


Thats pretty much the only way to do it. Definately the cheapest way.
You really don't have knowledge of machining do you? EDM is the most expensive way to do a magwell which is why few manufacturers use it.



Show me a major manufacturer who doesn't.
The big boys all use CNC and broach cutting for their magwells. EDM is too costly as it takes about 20-25 minutes per lower to cut. Broaching takes a few seconds. Smaller boutique makers use EDM because is is a good selling point and they don't have the quantity requirements of the big players.

Magwells are not that critical a dimension (.898 inches +/- .015 as per specs) to require EDM cutting. You have broached rifling in the barrel which is much more critical.

As per your request:

LMT, MMS, LAR, CMT, Superior, Aero all broach cut their magwells. I'd bet that covers 90% or more of all the lowers made.

ETA: all the forged lowers, billet are a different story.
THE LIMITS OF TYRANTS ARE PRESCRIBED BY THE ENDURANCE OF THOSE WHOM THEY OPPRESS

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saleen
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Posted: 2/11/2010 10:24:43 AM
I received a matched set back in November for a build, and put it away until my barrel came in. A couple of weeks ago, the barrel made it's appearance so I pulled the receivers out to get to work on building the gun. The color of the upper seemed a bit off, so I applied some oil and was rewarded with a purple hue that reminded me of some of the Bushmaster lowers from several years ago. Unacceptable.

I contacted Centerfire to exchange the upper for one that would match the lower (or at least just be black), and received it last night. The color is perfect on this one, but the holes for the dust cover are undersized. Not so much that the pin wouldn't fit, but tight none the less. Once installed, the dust cover is extremely difficult to close. It appears as though some slight file work where the detent engages the receiver will overcome this issue, so still not a shot stopper. I move to the final piece before the barrel ––- the forward assist ––- and find that the hole drilled for the retaining pin must be out of spec. The roll pin fits in just fine, but the hole is too far inbound to engage the forward assist. ARRRRRRRGH! No joy for the build, and no way that I can think of to fix it at home.

I have an email in to TNW regarding this. We'll see what develops. Oh well, at least the weather is crappy enough to keep me off the range anyway......


Saleen
03Cobrasb
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Posted: 2/11/2010 1:34:39 PM
[Last Edit: 2/11/2010 1:35:23 PM by 03Cobrasb]
Originally Posted By saleen:


the dust cover are undersized. Not so much that the pin wouldn't fit, but tight none the less. Once installed, the dust cover is extremely difficult to close. It appears as though some slight file work where the detent engages the receiver will overcome this issue, so still not a shot stopper. I move to the final piece before the barrel ––- the forward assist ––- and find that the hole drilled for the retaining pin must be out of spec. The roll pin fits in just fine, but the hole is too far inbound to engage the forward assist. ARRRRRRRGH! No joy for the build, and no way that I can think of to fix it at home.

I have an email in to TNW regarding this. We'll see what develops. Oh well, at least the weather is crappy enough to keep me off the range anyway......


Saleen


Built my upper a couple weeks ago, same problem with the dust cover pin, had to drill out and it is tight, will never come out on its own! Forward asst was fine works well, only other problem was install on the bolt assem. had to oil the hell out of it, worked it about two hundred times to get it loosened up. Charging handle loss some finish.
waiting on barrel will post build when finished.
saleen
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Posted: 2/13/2010 4:38:25 PM
I spoke with TNW, and they are aware of the problems this last batch had. I'm not sure what the cause of it is, but according to Mark, they are now checking 100% of them individually before shipping. He asked me to try my bolt carrier group and see if it was tight, sure enough, it was though I think it would wear in for a very good fit shortly.

I sent it back in to them and should receive the replacement next week. Hopefully, I'll clear this last hurtle soon enough and get this rifle to the range to make some noise!


Saleen
vkambull
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Posted: 2/16/2010 3:08:30 PM
I'm planning on building my first AR, should i try with this lower, and upper, or spring the extra 50 bucks for a stag or spikes lower. What exactly are m4 rails that i wont be able to install on this upper. sorry for the dumb question's but i'm green here. Also one more question, being that i'm green, should i just go get the dpms sportical at the gun shop for $699. Thanks
SniperKage
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Posted: 2/16/2010 3:22:22 PM

Originally Posted By vkambull:
I'm planning on building my first AR, should i try with this lower, and upper, or spring the extra 50 bucks for a stag or spikes lower. What exactly are m4 rails that i wont be able to install on this upper. sorry for the dumb question's but i'm green here. Also one more question, being that i'm green, should i just go get the dpms sportical at the gun shop for $699. Thanks

I can't comment on the TNW parts as I haven't ordered them yet (I did get my FFL to send his stuff to Centerfire, at least), but definately build it yourself. You'll eventually need the special tools and they aren't that expensive, and you'll know more about your gun if you build it yourself.
Jumping out of a perfectly good aircraft is not a natural act.

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saleen
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Posted: 2/17/2010 12:04:41 PM
[Last Edit: 2/17/2010 12:06:13 PM by saleen]
should i just go get the dpms sportical at the gun shop for $699.


I would say no. Too many corners cut for too little savings at that price.

The M4 "rails" you mention don't make sense. Are you referring to M4 "feed ramps"? You can actually install a barrel with the M4 ramps on the extension in one of these uppers, but you'll have to do some file work to blend them into the upper. I've done it before, and it's no big deal really. Early RRA guns had the same modification at the factory post-assembly (and they may still do it, I can't recall). I do remember my first RRA uppers back in 2002 had the "home cut" M4 ramp look and worked just fine.

I should have my replacement upper in the next few days, and hopefully will get this project moving again. When I do, I'll post pics.

As for the special tools to assemble, you are referring to a billet combo, right? If so, the usual upper receiver blocks won't work, so you'll need to get barrel vice clamps. I also use leather pads to prevent the aluminum transfer on surface finishes like Gunkote. They will probably scrub off without any problem, but I'd rather not find out. Aside from that, just a barrel wrench and punch set for the roll pins. Use electrical tape to protect the finish when you install the bolt stop, and take your time. Other "nice to have" parts are out there, but that's all the "specialized" tools you really need.

Saleen
SniperKage
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Posted: 2/17/2010 1:01:56 PM

Originally Posted By saleen:

As for the special tools to assemble, you are referring to a billet combo, right?

All I meant was barrel and stock wrenches. I use an automatic centerpunch to put in all the roll pins, and it's technically possible to tighten a carbine stock castle nut with a screwdriver, but a stock wrench makes it much easier.
Jumping out of a perfectly good aircraft is not a natural act.

10mm: Because bazookas only hold the one round.
sliverflinger
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Posted: 2/20/2010 7:26:41 PM
I'm no expert ,but the complete upper I got from TNW has the best fit and feel I've seen. No M4 cuts in the upper but it eats everything I feed it with out a hiccup. The piston system sort of reminds me of a G43. As soon as I get the pennies together , the wife gets one. It's the only way I can keep her from high grading mine after she shot it.
Beyond_Visual_Range
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Posted: 2/21/2010 11:43:09 AM
TNW now does complete upper with piston system?
viper5243
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Posted: 3/6/2010 3:13:55 AM
Originally Posted By GregP42:
The one I picked up was the forged, part #ARLOWER, they were out of the other one. I talked to them about the other one, and they said it was from someone different, not TNW.

Greg


I called today and the rep said the forged ones and the billet ones were from TNW. I picked up an Upper and Lower billet. If it's nice i might have it be my post sample lower.
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zoo9guy
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Posted: 3/7/2010 10:58:03 PM
I assembled my lower with a bartered LPK and a used A2 stock, everything fit great. I ordered the nitride coated DS Arms Mid-length fluted upper with BCG and CH for a total cost of 545.00. I'm waiting on delivery.............impatiently!
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