Browning Cal.50

[droopaille]

First there are the pics, i will comments a bit soon

The goal



Acad plans
droopaille.free.fr/Airsoft/M2/Browning M2.dwg


First cardboard model
Not the goog ammobox but i have nothing else




Cut in 1.5mm steel plate. White lines are the groove for the folds



Folding are made with a simple vice.



The first blank assembly. It makes 60cm long.




Pre cut of handles.




Different sizes of steel tubes for barrels




Find on FranceAirsoft, a paintballer who bought the external part and sold the inside
In this case of luck, in french we say : "i have the ass bordered with noodles"



First try for the holes, very difficult, my drill is turning too fast.




The solution was a hole saw.

[aj czarkowski]

"I have the ass bordered with noodles"!?

Not exactly sure what that means, but the project is looking good so far

[droopaille]

lol may be we can also say : "get his ass lined with noodles"
french literal transaltion ...

it means that i was very lucky to find there parts

[droopaille]

I add comments in the first post.
And the rest.


The trigger.
I think i have made harder than necessary.
Trigger push a double contactor : one for the gearbox and an other for the amobox








Front and rear plate in 5mm steel.




Finish of handles




Just for plasure of eyes.

[droopaille]

Drilling and taping of rear plate.




The wood part of handles.




And far time later, i made them round : it is nicely.

[/quote]

The trigger is finished.




Different parts of barrels :
- front plate
- airsoft barrel with hopup bloc
- barrel (750mm)
- barrel guide
- heat shield

[HornetWSO]

Incredible detail, impressive design, fantastic quality of your part fabrication. I'm quite excited to see this progress!! Keep it up!!

[shiftysgarand]

I like the steel construction.

[2nd Bat]

Tres Manifique!

[droopaille]

Thank you

[2nd Bat]

Without good tools, cutting and drilling metal is so difficult and time consuming. I have a .50 cal (not metal) so i will be curious to see how you do the internals and the feed system. In a perfect world it would be shooting 8mms and would be set up at extremely high power for angled plunging fire but automatically de tune when aimed directly so you'd have exceptional range but built in safety.

BIG ED built a spectacular .50 Cal way back when(all metal) that was pneumatic

[tango]

Fantastic work, looking forward to more updates!

Oct 8, 2013 2:20:02 GMT -5 2nd Bat said:

In a perfect world it would be shooting 8mms and would be set up at extremely high power for angled plunging fire but automatically de tune when aimed directly so you'd have exceptional range but built in safety.

That is a really interesting idea.

[shiftysgarand]

PPP(Piper's Precision Products) makes a $3000 GBB 8mm Browning M2HB, which is unbelievably awesome, but unbelievably expensive.

[2nd Bat]

It is no doubt a reflection of what it truly cost to make these if the intent is to sell them commercially people who have never taken on projects such as this haven't a clue how much time and effort they require.

The pipers PrecisionProduct is internally a fairly straight forward gas system that work quite well. It is a version of a design the Army once used During WW2 for aircraft gunnery using steel BBs. they were called McClashin devices and they forced high pressure compressed air into a reservoir of BBs which had a funnel that tapered into the barrel. A trigger allowed the pressurized air into the bb box. The Bbs were aggitaded by the air and were forced out the barrel at an incredible rate of fire. Power depended on the pressure applied but these guns were capable of tearing through garbage cans at a high enough PSI.

Gunners in bombers were trained Using them as it saved ammo and allowed training on the ground that wouldn't require the space or safety measures an actual .50 cal would require. The old trainer guns come up for sale from time to time and like a lot of things used to sell pretty cheaply.

BIG Eds .50 Cal functioned the same way and is a real hog for air but is extremely impressive both to look at and fire. My .50 cal is an AEG with a M249 gear box and box magazine it is mounted in my Jeep

[droopaille]

The system you discribe with high pressure chamber is known as cloud BBMG or more efficiency a vortex BBMG (you can easy find and make one for few money).

I don't know how you play but in France all teams accept the same conditions : full auto less than 350fps (0.2g), semi auto less than 400fps, and bolt less 450fps (legacy is under 2J for airsoft gun).
For my machine gun, i have to choises : less power but hight rate or high power and low rate. I had choosen the first one (350 fps with 9.6V power) but it had be more realistic to choose the second (400 fps with 7.2V power).
In my team all people play in semi auto except support gun and with the capacity of amobox, using the machine gun is a real advantage versus other players.

When i buit the .50 i hadn't my milling machine and my lathe, only a column drill, a grinders and access to a welding post in my job.
THe solution is very simple for the inside.
If you can't wait the translate, you can find the french tutorial and all of other mine here
droopaille.forumgratuit.org/t2-browning-m2-50

[2nd Bat]

The cloud vortex is a great approach but impossible to consistently use so that it stay within the fields FPS limitations. Too many variables that can go wrong. The French limits are very similar to the field FPS set up over here. i love that most of your players are limited to semi and you only allow box mags on the crew served weapons.

[droopaille]

the gearbox is fixed with a simple steel bracket and 2 screw




With the same steel, the bow support






And welded








Good job ! (TIG welding)





This parts for in inner ammobox with 4mm polycarbonat, just cut with a hand saw and a ruler






I add the inner part of M249 ammobox




The space reamining is for battery




Near the finish
Empty




Full




Little game : how many bbs at your mind ?

[HornetWSO]

6000

[2nd Bat]

You are getting excitedly close to finishing. It all looks terrific. Huge effort for a really cool project. Thanks for sharing. Looks like 4872 round magazine to me.

[droopaille]

The M2 is an old project finished since few years, and recently dissassembly for monting the cal.30.

Box contain a bit more : 10000 bbs (yeah it's a bit long to firing all of them) lol

[2nd Bat]

wow. 10,000 ready rounds. Serious battery required!!!!!!!

[shiftysgarand]

He needs what, a 6000 mah battery?

[droopaille]

Electrical supplier from M249 ammobox




inside the box




electrical plan : one push, two action (fire and supply)




In real, it is a bit less sexy





The front plate very barrel support

[droopaille]

little guide for the inner barrel, turned in plastic




The more difficult part : adjusting the gearbox with hopup bloc and front plate








First video from fire test
www.youtube.com/v/dn_EDRNBUg8


BB supply
www.youtube.com/v/-wnVHMHxzn4


Real fire test with BBs
www.youtube.com/v/zOe7TiSzSsQ


With the boby
www.youtube.com/v/NsR4wKfwlNI

[Flippy]

Hmmm... Really nice!!!

Only thing I don't like, is it's weight...

-How many cm is that ammo box inside (cm×cm×cm, or inch if you want...)? I mean the part which contains the 10000 BB... I'm asking because I'm thinking about my MG15's capacity.

-What kind off tubing do you use to guide the BBs (I mean what's the original function of that tubing)?

Thanx: F.

[HornetWSO]

Droop, You make it look so easy and common sense, the mark a true craftman!

[droopaille]

Many thanks but i'm not an magician, just a patient and stickler guy.

the tube is the spring of the amobox, there is 2 springs on M249, one for bbs and an other for the microphone wires (for sound control auto run)
twice are the same and they can be mounted end to end for more lenght
ID is 7mm
i'm looking for a supplier for buying some by meter for my .30, i know someone who had bought one but i don't know where

for the case, 195*135 and the bottom is an inclined plane

[droopaille]

Rest and end of this project. In fact, i haven't finished the machine gun. It is usable but there is no finishes, no paint ...

folding the cover hinge






The end of welding support.



Fixed the kneecap with a salvage part of pneumatic cylinder.




Holes for cables and spring loader




nearly the end !!



www.youtube.com/v/m3fFXVWGGRs

16.2 kg - 1m45 of steel for outing everybody : you shall not pass !!!!!!!


This is a tripod for having fun quickly but not cute




the heat shieldIt miss the maiden




In modern situations

[shiftysgarand]

Looks awesome! Tres bien!

[droopaille]

Thank you