Metric or Standard?

LUTNIT · February 8th, 2008, 13:34

What is the threading for the front end of an armalite receiver/back end of a RIS/RAS? Its just that I was told PTW's have a standard threading because they can fit real steel front ends out of the states which are, of course, standard. But just the other day I was helping two guys assemble PTW's and the G&P RIS fit perfectly onto the PTW, meaning its standard. Back when I had a G&P SR-25 I put a KA RIS on it and it fit fine, so is KA standard as well? I recently bought a Madbull dragonfire RIS and it was metric threading, didn't fit the PTW receiver at all (neglected to test it on the G&P receiver.) Just that there was a thread in the accessory sale section about someone selling a metric RIS because their very old ICS armalite had standard threading. Was it just a fluke that he got a metric RIS or whats going on?

mcguyver · February 8th, 2008, 14:24

The metric thread is 1.50 t/mm and the Imperial thread is 15 t/inch. I have a MetalTech RAS that is metric, and it doesn't fit a PTW. I reworked the threads on the PTW with a metric thread file for about an hour until it did fit. The PTW is Imperial threads, and so is the real gun.

LUTNIT · February 8th, 2008, 21:45

But are most airsoft RIS/RAS's metric or standard? If the threads are totally different then why does a G&P RIS fit on a PTW? I've put a King Arms RIS on a G&P body, thats why I'm wondering.

mcguyver · February 8th, 2008, 21:53

Not all airsoft guns are made the same. Remember old CA guns that you couldn't find rails for years ago? The Metal Tech RAS fit those no problem, so I guess they were metric.

LUTNIT · February 22nd, 2008, 21:26

Heres a kicker.....

Madbull RIS, does not fit my PTW, does fit a stock TM receiver = metric
G&P RIS, does fit PTW, unknown if it fits TM but fits G&P = standard
King Arms RIS, does fit PTW, DOES fit a stock TM receiver = !?!?

I know the PTW is standard threading and I know the Madbull RIS is metric thus the incompatibility. But the KA one fits standard and metric threading....is it just a loose thread thats compatible to both? When I tightened the KA barrel nut with a barrel wrench it was just as solid as the stock PTW barrel nut so I figured its not too loose of a thread or it wouldn't be able to be cranked on that tight.

A heads up for PTW owners at least, both G&P and King Arms threading will fit PTW's, Madbull will not.

mcguyver · February 22nd, 2008, 21:32

I noticed that when I used a metric thread file to fit rework the threads to fit the MetalTech RAS on the M16, I could still re-install the factory PTW barrel nut. I think what I ended up doing doing was taking the threads down enough so that either would fit, but not perhaps as good of a thread "mesh" as if I used an Imperial barrel nut on a receiver with Imperial threads. But either one holds up solid.

That sucks about the Madbull, but at least I've already altered the threads so I could fit it anyways.

Jugglez · February 22nd, 2008, 21:43

I've spoken to Mad Bull about about offering a separate barrel nut with imperial threads. They plan to release one for each of their Dragon Fire CNC Handguards and JP Rifle kits.

ThunderCactus · February 22nd, 2008, 23:19

Didn't Hong Kong used to be a British colony? Would explain why theres standard products coming out of asia...

LUTNIT · February 22nd, 2008, 23:25

Except all of Asia and Europe are metric. There are only three countries in the world that are still standard, the United States and two third world countries that are too poor to change. Take the PTW for example, everything threaded on the real AR is threaded standard on the PTW but parts that aren't on the real AR (mechbox, motor plate, etc.) are threaded metric.

mcguyver · February 22nd, 2008, 23:30

Most of those other parts have no upgrade potential from real steel parts manufacturers though. Imagine how Systema's PTW sales would be if it was threaded metric, and was not compatible with real accessories? For many guys, this is a huge selling point.

HaZarD SFD · February 22nd, 2008, 23:31

Would be a nice idea though if they did sell a Metric threaded upper.

LUTNIT · February 22nd, 2008, 23:32

Or just don't buy Madbull products for PTW's......

HaZarD SFD · February 22nd, 2008, 23:36

Well im glad you did it first.. then again that was a nice RAS

ThunderCactus · February 23rd, 2008, 01:37

Maybe G&P wanted people to be able to use real steel parts on their guns? Or they realized not many other people had a standard RAS so they made one just for the PTW's sake?

LUTNIT · February 23rd, 2008, 19:32

I doubt G&P made their products both just for the PTW. It was said on a sale thread a little while ago that a guy was selling a RAS because it was metric and his old ICS was standard. Its probably because there are differences in manufacturers and G&P and KA wanted their products to be universal.

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February 8th, 2008, 13:34	#1
LUTNIT Trader rating Join Date: Dec 2005 Location: Ottawa	Metric or Standard? What is the threading for the front end of an armalite receiver/back end of a RIS/RAS? Its just that I was told PTW's have a standard threading because they can fit real steel front ends out of the states which are, of course, standard. But just the other day I was helping two guys assemble PTW's and the G&P RIS fit perfectly onto the PTW, meaning its standard. Back when I had a G&P SR-25 I put a KA RIS on it and it fit fine, so is KA standard as well? I recently bought a Madbull dragonfire RIS and it was metric threading, didn't fit the PTW receiver at all (neglected to test it on the G&P receiver.) Just that there was a thread in the accessory sale section about someone selling a metric RIS because their very old ICS armalite had standard threading. Was it just a fluke that he got a metric RIS or whats going on?

February 8th, 2008, 14:24	#2
mcguyver Trader rating Join Date: Aug 2005 Location: Northern Alberta	The metric thread is 1.50 t/mm and the Imperial thread is 15 t/inch. I have a MetalTech RAS that is metric, and it doesn't fit a PTW. I reworked the threads on the PTW with a metric thread file for about an hour until it did fit. The PTW is Imperial threads, and so is the real gun. __________________ Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy.

February 8th, 2008, 21:53	#4
mcguyver Trader rating Join Date: Aug 2005 Location: Northern Alberta	Not all airsoft guns are made the same. Remember old CA guns that you couldn't find rails for years ago? The Metal Tech RAS fit those no problem, so I guess they were metric. __________________ Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy.

February 8th, 2008, 21:45	#3
LUTNIT Trader rating Join Date: Dec 2005 Location: Ottawa	But are most airsoft RIS/RAS's metric or standard? If the threads are totally different then why does a G&P RIS fit on a PTW? I've put a King Arms RIS on a G&P body, thats why I'm wondering.

February 22nd, 2008, 21:26	#5
LUTNIT Trader rating Join Date: Dec 2005 Location: Ottawa	Heres a kicker..... Madbull RIS, does not fit my PTW, does fit a stock TM receiver = metric G&P RIS, does fit PTW, unknown if it fits TM but fits G&P = standard King Arms RIS, does fit PTW, DOES fit a stock TM receiver = !?!? I know the PTW is standard threading and I know the Madbull RIS is metric thus the incompatibility. But the KA one fits standard and metric threading....is it just a loose thread thats compatible to both? When I tightened the KA barrel nut with a barrel wrench it was just as solid as the stock PTW barrel nut so I figured its not too loose of a thread or it wouldn't be able to be cranked on that tight. A heads up for PTW owners at least, both G&P and King Arms threading will fit PTW's, Madbull will not.

February 22nd, 2008, 21:32	#6
mcguyver Trader rating Join Date: Aug 2005 Location: Northern Alberta	I noticed that when I used a metric thread file to fit rework the threads to fit the MetalTech RAS on the M16, I could still re-install the factory PTW barrel nut. I think what I ended up doing doing was taking the threads down enough so that either would fit, but not perhaps as good of a thread "mesh" as if I used an Imperial barrel nut on a receiver with Imperial threads. But either one holds up solid. That sucks about the Madbull, but at least I've already altered the threads so I could fit it anyways. __________________ Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy.

February 22nd, 2008, 21:43	#7
Jugglez Trader rating Join Date: Feb 2005 Location: Swimming in a pool of Xpresspost receipts.... Toronto - 400/401	I've spoken to Mad Bull about about offering a separate barrel nut with imperial threads. They plan to release one for each of their Dragon Fire CNC Handguards and JP Rifle kits. __________________

February 22nd, 2008, 23:19	#8
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	Didn't Hong Kong used to be a British colony? Would explain why theres standard products coming out of asia...

February 22nd, 2008, 23:25	#9
LUTNIT Trader rating Join Date: Dec 2005 Location: Ottawa	Except all of Asia and Europe are metric. There are only three countries in the world that are still standard, the United States and two third world countries that are too poor to change. Take the PTW for example, everything threaded on the real AR is threaded standard on the PTW but parts that aren't on the real AR (mechbox, motor plate, etc.) are threaded metric.

February 22nd, 2008, 23:30	#10
mcguyver Trader rating Join Date: Aug 2005 Location: Northern Alberta	Most of those other parts have no upgrade potential from real steel parts manufacturers though. Imagine how Systema's PTW sales would be if it was threaded metric, and was not compatible with real accessories? For many guys, this is a huge selling point. __________________ Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy.

February 22nd, 2008, 23:31	#11
HaZarD SFD Trader rating Join Date: Sep 2005 Location: Ottawa	Would be a nice idea though if they did sell a Metric threaded upper. __________________ No Comment.

February 22nd, 2008, 23:32	#12
LUTNIT Trader rating Join Date: Dec 2005 Location: Ottawa	Or just don't buy Madbull products for PTW's......

February 22nd, 2008, 23:36	#13
HaZarD SFD Trader rating Join Date: Sep 2005 Location: Ottawa	Well im glad you did it first.. then again that was a nice RAS __________________ No Comment.

February 23rd, 2008, 01:37	#14
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	Maybe G&P wanted people to be able to use real steel parts on their guns? Or they realized not many other people had a standard RAS so they made one just for the PTW's sake?

February 23rd, 2008, 19:32	#15
LUTNIT Trader rating Join Date: Dec 2005 Location: Ottawa	I doubt G&P made their products both just for the PTW. It was said on a sale thread a little while ago that a guy was selling a RAS because it was metric and his old ICS was standard. Its probably because there are differences in manufacturers and G&P and KA wanted their products to be universal.

Metric or Standard?

Airsoft Guns Discussion