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View Full Version : Who makes a stainless steel AR15 OLL?


tenpercentfirearms
11-30-2006, 4:17 PM
I have a customer who wants a stainless steel AR15 OLL. They said DPMS makes one, but I am pretty sure that is listed. What do you guys know?

And yes I searched for an answer first. :p

The Professional
11-30-2006, 4:23 PM
I have a customer who wants a stainless steel AR15 OLL. They said DPMS makes one, but I am pretty sure that is listed. What do you guys know?

And yes I searched for an answer first. :p

Wes, I'd be interested too if you find one...

Good luck and kindly let me know!

M14Gunman
11-30-2006, 4:34 PM
DPMS part number: LR-05-SSA

"Description

Constructed of 410 Stainless Steel. This lower is stronger than any aluminum lower on the market.


Includes Mil-Spec A2 Buttstock Assembly and A2 Pistol Grip.
Weighs approximately 1 3/4 lbs. stripped."

The Professional
11-30-2006, 4:46 PM
DPMS part number: LR-05-SSA

"Description

Constructed of 410 Stainless Steel. This lower is stronger than any aluminum lower on the market.


Includes Mil-Spec A2 Buttstock Assembly and A2 Pistol Grip.
Weighs approximately 1 3/4 lbs. stripped."


Good stuff! I could not seem to find some pics of it though...

The Professional
11-30-2006, 4:52 PM
It looks like they make several


http://www.dpmsinc.com/store/products/images/?type=small&id=858

http://www.dpmsinc.com/search/?s=Stainless+lower+


This one below is a stripped lower where the others are with the buttstock and PG

http://www.dpmsinc.com/store/products/?prod=858


Gee, thanks Sam! You are really good in finding the good "pictures"!:D :p

SemiAutoSam
11-30-2006, 4:55 PM
It looks like they make several


http://i80.photobucket.com/albums/j184/mag-lock/DPMSSSLOWER.jpg
http://www.dpmsinc.com/search/?s=Stainless+lower+


This one below is a stripped lower where the others are with the buttstock and PG

http://www.dpmsinc.com/store/products/?prod=858

BTW this Part# Model: LR-05-SSA

Constructed of 410 Stainless Steel. This lower is stronger than any aluminum lower on the market.


Includes Mil-Spec A2 Buttstock Assembly and A2 Pistol Grip.
Weighs approximately 1 3/4 lbs. stripped.

xenophobe
11-30-2006, 5:10 PM
Judging by the picture (and lack of the word Panther or the Panther logo) and the model #, I'd sa this was probably off-list.

M14Gunman
11-30-2006, 5:41 PM
Isn't buying a stainless steel lower like purchasing waterproof targets at an indoor range???

T56 aluminum is plenty strong and does not weather... whats the advantage other than saying "mine is SS"?

I can see that it would be much more resistant to wear but anodized T56 doesn't really wear out does it?

mltrading
11-30-2006, 5:47 PM
There was a thread discussing SS lowers. The biggest problem of SS lowers is the heat. Once the SS lower got heated, many owners of such receiver have experienced internal parts freeze or hard to move. But such situation seldom happen on aluminum lowers.

That's what I remember.:)

Paul
11-30-2006, 5:48 PM
DPMS part number: LR-05-SSA

"Description

Constructed of 410 Stainless Steel. This lower is stronger than any aluminum lower on the market.


Includes Mil-Spec A2 Buttstock Assembly and A2 Pistol Grip.
Weighs approximately 1 3/4 lbs. stripped."

It's also heavier than any aluminum lower on the market. :D

And correct me if I'm wrong (and I'm not) that the AR was engineered and designed to be made in aluminum and that in the history of the few million made no lower has yet known to have worn out.

I've seen weapons at the school of riflemenship that the MCRD has run countless tens of thousands of rounds through and none of the lowers have gone bad. Plenty of barrels shot out but not the lower. There's a lot of engineering and design behind the whole weapon and the lower isn't the weak part.

That be said I've seen lowers made of a whole bunch of stuff including steel and even copper. Via la difference.

M14Gunman
11-30-2006, 5:57 PM
There was a thread discussing SS lowers. The biggest problem of SS lowers is the heat. Once the SS lower got heated, many owners of such receiver have experienced internal parts freeze or hard to move. But such situation seldom happen on aluminum lowers.

That's what I remember.:)

I think if you shot enough consecutive rounds to the point that the lower receiver heated up as to change the physical demensions of stainless steel your barrel would melt off.... there is not a lot of friction in a lower receiver.... especially considering how much is in the upper.

kap
11-30-2006, 5:57 PM
Seems like a novelty, but if that is what they want.

A titanium one is actually cheaper.

http://www.vbd.com/noc/shop/products_detail.asp?CategoryID=29&ProductID=286

SemiAutoSam
11-30-2006, 6:03 PM
This Titanium one is only 80% for those that want to DROS the receiver and not finish it themselves the stainless steel one seems like the way to go.

I have a Titanium receiver that I made myself but the material is very expensive I wouldn't advise it for your average Joe six pack.

Seems like a novelty, but if that is what they want.

A titanium one is actually cheaper.

http://www.vbd.com/noc/shop/products_detail.asp?CategoryID=29&ProductID=286

Mark_in_Pasadena
11-30-2006, 6:07 PM
Seems like it would be kinda heavy, but what do I know.....

SemiAutoSam
11-30-2006, 6:21 PM
Titanium is a little heavier than aluminum but much stronger (im not sure how much) stainless is heavier than aluminum and titanium but also stronger than both.

The DPMS stainless receiver weighs 1.750 lbs

M14Gunman
11-30-2006, 6:57 PM
Here are the numbers for various metals...

T52 Aluminum Alloy:
Ultimate Tensile Strength, psi 27,000
Yield Strength, psi 21,000
Brinell Hardness 60

410 Stainless Steel
Ultimate Tensile Strength, psi 65,000
Yield Strength, psi 30,000
Elongation 20 - 34%
Rockwell Hardness B82 (converts to 131 Brinell)

Grade 2 Titanium:
Ultimate Tensile Strength, psi 50,000
Yield Strength, psi 40,000 - 65,000
Elongation 20% min
Rockwell Hardness B70 - B90 (converts to 111 Brinell)

Grade 5 Titanium:
Ultimate Tensile Strength, psi 138,000
Yield Strength, psi 128,000
Elongation 14%
Rockwell Hardness C36 (Converts to 285 Brinell)

1081 Mild Steel:
Ultimate Tensile Strength, psi 63,800
Yield Strength, psi 53,700
Elongation 15.0%
Rockwell Hardness B71 (converts to 126 Brinell)

C110 Copper:
Ultimate Tensile Strength, psi 31,900
Yield Strength, psi 10,000
Rockwell Hardness F40


Grade 5 titanium is an alloy of 4% aluminum... the added strength is ENORMOUS... as you can see well above that of straigh titanium or stainless steel... its crazy what a little chemsitry will do.

PIRATE14
11-30-2006, 7:34 PM
I've built a few rifles on these and they are different and heavy......SS isn't really req'd here.......but hey if you want one...go for it:D

grywlfbg
12-01-2006, 10:19 AM
Seems like a novelty, but if that is what they want.

A titanium one is actually cheaper.

http://www.vbd.com/noc/shop/products_detail.asp?CategoryID=29&ProductID=286

:eek: MUST.... RESIST.... CREDIT.... CARD..... MELTING.....

But seriously. How can I get one? I don't think I'm ready to be drilling and tapping holes into titanium. Can I have this sent to a 'smith here in Cali to have them tap the holes and then DROS it to me? I don't know what an 80% lower exactly entails....

Chris

Fjold
12-01-2006, 11:36 AM
Building a titanium or stainless lower is like buying Kevlar napkins. You can do it but why?

kap
12-01-2006, 12:49 PM
Building a titanium or stainless lower is like buying Kevlar napkins. You can do it but why?
Don't discount that idea outright. You never know when a dinner guest may go crazy and all you have to defend yourself is that Kevlar napkin. ;)

But I agree it is just the novelty of a different metal that makes it interesting.

M14Gunman
12-01-2006, 1:33 PM
Build one out of hardened plexiglass.... now THAT would be cool.... especially if one could build a mag body that was transparent...

grywlfbg
12-01-2006, 1:33 PM
I agree. I just have this unnatural motorsports-related fascination with anything titanium - my wedding ring is even titanuim w/ a platinum inlay :D

Cazach
12-01-2006, 2:21 PM
FYI & FWIW, 410 series stainless will rust.

SemiAutoSam
12-01-2006, 2:25 PM
And its also somewhat magnetic that why I made mine out of 316 Grade stainless.

Who ever wants 80% receivers out of this material PM me.

Keep in mind I will only mfg these with 100% payment.

dw1784
12-01-2006, 2:30 PM
I've got links to ASM metals handbook and machinery's handbook plus lots of engineering ebooks if anyone's interested(composites, powder metallurgy, mech eng handbook, linear prog, FEA, CFD, etc). If ur interested in look'n up proper nomenclature, classification and properties, PM me and I'll send u the links.

re: Ti 80% lowers.
not sure which Ti(prob Ti-6Al-4V, most common cast Ti). Tool quality and wear is your priority. It's a tough mtl to work with. Your hss drill bits from sears(worse, harbour freight) will not do the job(ok for a few shallow holes, but don't know how extensive the mtl removal is). SiC/SiN/TiN inserts preferred.

why would anyone need a Ti? Corrosion- especially if it's marine app. Another use is where static electricity is a concern, like a particular grp that uses carbon/ceramic knives:D

thedonger
12-02-2006, 7:36 AM
If one purchased an 80% lower aside from having to do the finishing what is the process to register it and when do you have to do it?

SemiAutoSam
12-02-2006, 8:05 AM
What do you mean by register ?

as its not a handgun I don't think it has to be registered.

If one purchased an 80% lower aside from having to do the finishing what is the process to register it and when do you have to do it?

thedonger
12-02-2006, 8:40 AM
I guess what I mean is do you need to DROS it or what is the process to build it up legally?

SemiAutoSam
12-02-2006, 8:46 AM
You just buy it from a company that builds 80% receivers and you finish it to your needs. I understand you want it to be legal.

Maybe BW can explain it better. From my understanding if you can truthfully fill out a 4473 and not be in violation you can build this item yourself and possess it.

It will be legal without a DROS as its not a handgun and should not need to be registered.





I guess what I mean is do you need to DROS it or what is the process to build it up legally?

thedonger
12-02-2006, 8:50 AM
I assume a 4473 is the dros from. So if I can Dros a finished ar lower I can buy an 80% and finish it my self and be legal?

SemiAutoSam
12-02-2006, 8:53 AM
This is the 4473 its a federal form BATF&E supplies to FFL'S. there are many different versions of it depending on time and updates ect reversions.

The DROS is a California DOJ form .

http://www.instapunk.com/images/BATF_Form_4473a.png
http://www.atf.gov/forms/4473/images/4473-1.gif


I assume a 4473 is the dros from. So if I can Dros a finished ar lower I can buy an 80% and finish it my self and be legal?