MK203 - Update and poll

[koldt]

Here's a pic of the stand-alone Arwin gun 40mm.

Mike, not trying to hijack your post, just get some interest and excitement going on your project.

 

[KyleM]

Why does the Dimaco launcher sit so low under the barrel compared to the LMT and Colt made launchers?

 

[P0WERWAGON]

I can't remember the exact cost, but landed was in the $250Can range.

on the site it shows $650 now. i must be looking in the wrong spot.

 

[Missing Something]

Look about halfway down the page. There is just the mount itself....

http://www.uncompany.com/pageproduct.asp?subcatid=320

 

[koldt]

Here's the new KAC stand alone . Not a big fan, and don't know why they figured they needed to do the CAR style stock. Fashion maybe

 

[Armedsask]

don't know why they figured they needed to do the CAR style stock.

Didn't you hear? All firearms are now required to use a CAR stock.

 

[peckerwood]

MMMMMMMMMMMMMMM...CAR stock

 

[cpt. canuck]

Have we figured out how to rifle the barrels yet?

 

[NavyShooter]

Yeah,

I think the barrel rifling was the real issue for now....the receiver is just an exercise in machining.

The barrel rifling is the sticky point now.

NS

 

[Chris7_62]

Is it too late to get in on this project?

 

[MikeH]

Barrell rifling is....how shall I say...still an opportunity?
Koldt - those renderings are fine to have up, I will try to have some updated ones by monday next week.

Chris - Nope definately not to late, this project has been on going now for about 2 years....

 

[peckerwood]

I know this has been debated to death but...

I heard that the barrels are produced using a high-grade aluminum, that is rifled to specs...so...

What about using some high carbon seamless steel tubing that is then button rifled to finish...then heat treated to specific hardness requirements?

Although it would not be the same weight...obviously heavier...it would still be stronger than the original would it not? And with the possibility of it being composed of seamless thin sheet steel tubing it would almost be easier to produce on a less complicated manufacturing level.

That and the fact it would be easier to attach other pieces of steel to it because it can be easily welded.

Anyone...?

 

[McNasty]

What about using some high carbon seamless steel tubing that is then button rifled to finish...then heat treated to specific hardness requirements?

That and the fact it would be easier to attach other pieces of steel to it because it can be easily welded.

Anyone...?

The turn is like 1 in 40". So I doubt it could be rifled. I checked some cnc shops and they couldn't figure a way to do it.
Nothing is attached to it. The parts on the top are machined into it.
I've been build ing one for awhile, but gave up because of the lack of barrels. But I recently acquired one so I am about to start again.

 

[peckerwood]

Steel is too heavy. Cannot compromise on that.

All purists should be banned...BANNED I SAY

How's about a minor compromise...say a thin steel tubing rifled barrel centre wrapped in Carbon fibre?

I doubt that carbon fibre alone would be able to contain the pressures...but with the steel rifling who knows...seems to work for other high pressure rifles that have solid steel chambers.

Plus I also have a simple design for a rifling machine that uses a broach to cut one rifling channel at a time. It is composed entirely of tube steel and should work fine on forged aluminum tubing, and with the right cutters it should work on carbon steel tubing as well.

[edit] Another question...what is the exact aluminum used for the M203 barrel...dimensions of the barrel...dimensions of the cartridge, chambering, etc... and what are it's acceptable SAAMI pressure limits.