Race Gun Thread

[RacingManiac]

btw 7075 billet costs significantly more(and for good reason, its almost twice as strong in yield)

[ILLusion]

Originally Posted by RacingManiac

btw 7075 billet costs significantly more(and for good reason, its almost twice as strong in yield)

I agree, but as far as raw material costs, that's not what makes up the majority cost of these parts. Most of that cost goes in to the labour. It can't possibly add THAT much to the bottom line price of the item...

[the4thpower3]

You see why I want to know who's REALLY behind all this? We don't know what we are really getting.

My new ProG4 slide show zero signs of wear.
As opposed to the Shooters Design Slide which I remember after only a couple hundred rounds started to get banged up right at the rear chamber hood.

Does anyone know what the SD slides are made of?

The Davidson Customs slides are listed as 7075 (what? 0 or T6) http://davidsoncustom.com/product.php?cid=0

Where as ProG4 and Airsoft Surgeon are listed as 6061.....hmmm 6061 what? And if it is the same "supplier/manufacturer" why do these guys list different material?
I'm sure it is the same manufacturer because they all list the same slide with the same "wrong" trademarks (ie. the Kodiak Precision / Brazos Customs slide - those tow companies have nothing to do with each other BTW.) So who's got the right information?............the manufucaturer! Who is the manufacturer?!! Who is Kofka? Why are you eating my sesame cake?
YouTube - How to Have Some Coffee and Cake


I agree - they definetly should be used 7075 - T6 aluminum.

We don't know what we are really getting. The only time it really matters is when it causes a problem.
Like the tensile strength of 6061 T6 Aluminum vs 7075 T6. Using 7075 T6 would make a difference. It wouldn't get smashed up like 6061 T6.

Just like our discussion on what ProG4 uses for his outer barrels. 303 or 304 ss?
I'm not sure if he (CaptainKK) even really knows. Maybe he does and says 304 because people would assume 304 is better?

Here's an exerpt from http://www.ssina.com/faq/index.html

Can stainless steel be machined?

Answer: Yes. However the standard grades of stainless steel are usually "gummy" and will not produce a clean chip when machined or turned. To solve this problem, many companies produce "free-machining" grades of stainless where they add a "chip-breaker" to the matrix. Grade 303 is the free-machining equivalent to grade 304.

[RacingManiac]

IMO, regardless of the grade, with decent design it should work for the purpose of AS, we not not dealing with nearly as much energy being released here as a RS gun. And in terms of material, it might just be the case of whats available at what time. I remember when I was in school working on the race car project, that sometimes we have to track down multiple suppliers to get 7075 stock...I am surprised if they use it at all....

[ILLusion]

I had the same train of thought as RM, in that the materials changed based on what was available at the time.

But back to the topic of the 303/304 SS barrels, I just requested a quote for another couple of projects from Captain KK and was quoted 303 SS for one of the barrels.

I shot an email back to him on "why the change to 303 when all other barrels you've made for me were quoted as 304?"
Still waiting on a reply, maybe tonight.

[the4thpower3]

Interesting.......................

[ILLusion]

Yes... this thread has been full of interesting info so far...

and here's my reply on the 303/304 outer barrel issue:

Originally Posted by Captain KK

It is no difference between steel 303 and steel 304 in toy barrel. You can not find out which one is 303 or 304 if I give you for chose. We have made steel 304 barrel before. Anyway we will build steel 303 barrel on following orders.

[the4thpower3]

Yeah, that's about what I would expect him to say.
Does it really matter? I doesn't to me...I wouldn't know the difference.
The outer barrel will never break one way or the other.
I'm still interested to know why the difference??? But...
Just as you guys were saying, it maybe just the material that is available at the time.

The aluminum slides is a different story. I think the design is part of preventing problems, but the tensile strength of 7075 T6 could also help prevent that type of deformation. I've had quite a few slides with the same damage (not from ProG4..mostly SD)...but it has never caused me any problems. I would normally just sand it down a little. I'm honestly not sure of what my ProG4 slide is made of. I just assumed 6061 T6. I don't care (but still interested to know) so long as it doesn't cause a breakage type problem.

[the4thpower3]

ProG4 just listed a new custom TM for sale http://www.prog4.com/db/product-show.asp?refno=AR1491

[RacingManiac]

yeah I saw that...very nice one too.....

[RacingManiac]

wait what?!

(11) LOADING MUZZLE:- CNC MILLING. ALUMINIUM.

Do they mean the BBU?

[the4thpower3]

LOL. yeah his terms aren't quite right.
I call it a breech. Others call is BBU (Blow Back Unit). KK calls it loading muzzle.

[RacingManiac]

BTW, I hope someone start making custom hop-up chamber for Marui.....I don't know what would be different about a custom one, but I am surprised there weren't any....

[the4thpower3]

Acutally that is one of the things I've been pushing for for a long time.
I actually want a steel unit. But I also want a custom inner barrel that would rid the hop up entirely. It could be done, espeically since there are some inner barrels designed relatively similar.

Wanna see something interesting?

stick this link in google and hit translate http://www.geocities.jp/shooters_fil...2004-11gun.htm

[ILLusion]

Yeah, I've been pushing Captain KK to push out aftermarket hop up units as well.

Here's a snippet of a secret:
He's currently working on a new product that interacts with the hop up unit. The result is greater survivability of the slide.

In any case, that was what sparked my conversation with him to manufacture hop up units... but you know how stubborn he is... he feels it's not necessary. :P