Bren MK1m, My inter...
 
Notifications
Clear all

Bren MK1m, My interpretation

 
(@lazyboy)
Active Member

The gun is made of Aluminium

It has an airsoft 650mm barrel, with a modified hopup.

HPA powered through a computer controlled custom built engine

Rate of fire is 480 rpm

Magazine holds 110 rounds.

Electrics powered by a 12 volt 600 mAH battery in lower body.

Initial testing on 75 - 80 psi, has it shooting at 1.38 joules, firing .4's and was firing 60 metres +.

With .25's, they were over hopping with the no hop on, have been told a softer bucking may solve that.

Firing hot so with turning and lighter BBs should get it down to safe levels

Here is a video, showing stripping and dry firing the gun
[link]https://www.dropbox.com/s/hpmv03z1jgirxez/Bren%20Strip%20and%20dry%20fire.mp4?dl=0[/link]-- attachment is not available ---- attachment is not available ---- attachment is not available ---- attachment is not available ---- attachment is not available --

Quote
Topic starter Posted : 10/03/2020 10:09 pm
(@lord-elpus)
Noble Member

I can’t get photo’s up, but did get on the link, looks great! Well done! Put up more pic’s!
Andy

ReplyQuote
Posted : 13/03/2020 12:58 pm
(@lazyboy)
Active Member

I can’t get photo’s up, but did get on the link, looks great! Well done! Put up more pic’s!
Andy

Thanks
I have replaced the photos, so hopefully you can now see them

ReplyQuote
Topic starter Posted : 15/03/2020 10:58 pm
dadio
(@dadio)
Famed Member

That's a superb build well done good sir

armoury
m1a1 Thompson,sten mk2,mp40,stg44,sterling,mk2 bren gun,lee Enfield no4 mk1,Mauser Kar98, Walther ppk,smith and Weston m10 and Mauser m712
Give me a big enough hammer and a place to stand and I could fix the world.
i'll kill a man in a fair fight or if i think he's going to start a fair fight or over a woman or.......
a problem shared is a problem halved ,but an advantage shared is no advantage at all
if a job's not worth doing then its certainly not worth doing well





ReplyQuote
Posted : 24/03/2020 5:07 pm
SCVNGR
(@scvngr)
Estimable Member

Did you make the body yourself?

ReplyQuote
Posted : 24/03/2020 10:55 pm
(@kingmaker)
Estimable Member

Top class work there,like the sound and rate of fire,very realistic.

ReplyQuote
Posted : 26/03/2020 8:51 am
(@lazyboy)
Active Member

Thanks for your replies.
SCVNGR yes I did make the body.
The flat pieces where sliced from my 3D model and laser cut, then glued and riveted together, other bits are welded.
The round bits were made on a lathe.

ReplyQuote
Topic starter Posted : 03/04/2020 11:45 pm
(@kingmaker)
Estimable Member

how did you build
the hpa engine did you source your own solenoid,what chip do you use to control it?is it an arduino?

ReplyQuote
Posted : 04/04/2020 8:05 am
(@lazyboy)
Active Member

Hi Kingmaker.
The gas block is made out of Brass 25mm hex bar and is basically a blow forward bolt, reversed, ie the the small valve pushes the nozzle back to load and a spring closes it when pressure is off .
This happens as the first step in the firing sequence, folowed by a pause then the main valve fires the round.
The small solenoid valve is a Mac series 33, 6 volt valve I had lying around and the main valve is a Mac series 34, 12 volt, 4 Watt valve brought off Ebay.
You need the 4 Watt version to get good performance, I also removed the brass filter from the inlet of the valve for more flow.
The micro computer is the Picaxe 08m2, (PICAXE-08M2 Module (AXE231)) plus volt regulator, and a couple of ndrive mosfets.
I have just brought a number of ATtiny85 Digispark Kickstarter Micro USB Development Board Module and are hopping to use them, as it will dramatically reduce the electronic footprint .
I am a complete armature with electronics so need to puzzle my way through using the ATtiny's,.

ReplyQuote
Topic starter Posted : 05/04/2020 1:30 am
(@kingmaker)
Estimable Member

well it sounds like you have it sorted to me you should start your own HPA engine company,are you in
sorry mentioned Australia again

ReplyQuote
Posted : 05/04/2020 6:40 pm
(@lazyboy)
Active Member

Wash your mouth out , New Zealand.
Nice idea but a bit old for the company sort of thing,
Mainly do this to learn and keep the brain ticking over.

ReplyQuote
Topic starter Posted : 05/04/2020 9:10 pm
(@kingmaker)
Estimable Member

Did you programme the processor too?Airsoft is still banned in Australia I believe,they have to do with Gel blasters
sorry mentioned Australia again

ReplyQuote
Posted : 07/04/2020 3:48 pm
razorlight
(@razorlight)
Reputable Member

That is very impressive. Superb work. Well done!


ReplyQuote
Posted : 11/04/2020 11:49 am
(@lazyboy)
Active Member

Hi
Re Kingmaker, yes I did, I modified the program I used for my Owen gun, which was developed with the help of the Picaxe micro computer forums.

ReplyQuote
Topic starter Posted : 28/04/2020 2:14 am
Share: