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 Post subject: .50 browning
PostPosted: Tue Mar 15, 2005 23:05 pm 
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Joined: Wed Feb 18, 2004 22:48 pm
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Location: Marden Kent
Real Name: pete cosgrove
Group: Vickers MG Collection & Research Association
reading Armoured Guardsman at the moment. and the author said he was sent over by his CO to a Canadian Armoured unit as they had a tip off that the canucks had some how managed to speed up the rate of fire on the 50 cals no answer is given in the book

how could this be done?

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PostPosted: Wed Mar 16, 2005 1:49 am 
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Joined: Mon Dec 29, 2003 19:29 pm
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Location: Northants, England
Real Name: Paul Bellamy
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Hi Pete.....

When it comes to the M2...... and in fact all MGs.... ROF can mean many things.

The specs for the M2 Browning state:

Sustained: < 40 rpm
Rapid: > 40 rpm
Cyclic: 450-550 rpm

The makers say 700rpm, the US Army say 500rpm.

There is a possibility that the Canadians could have fitted AN-M2 parts, that is aircraft spec M2 parts, which were rated at 750-800rpm.

Note: this is a CYCLIC ROF, not a sustainable rate of fire.

Just my thoughts,

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PostPosted: Thu Mar 17, 2005 10:12 am 
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Location: Trying to work out why the GPO has the guns pointing the wrong way
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According to a friend who is a military armourer the M2 is very very tempremental and mucking around with rates of fire could have made it very unreliable.

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PostPosted: Thu Mar 17, 2005 11:22 am 
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Joined: Fri Mar 05, 2004 9:05 am
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Real Name: Chris Woffenden
Group: Victory in Europe Reenactment Association
Many of the Brownings fitted to British AFVs in the field were sourced from crashed US aircraft...

I read somewhere a wonderful account of a Liberator that had crashed landed the crew were sat waiting for rescue when a Bren carrier full of tommies appeared on the horizon driving towards them at speed. the USAF aircrew started to amble towards their 'rescuers'...

The carrier sped past them and withinin minutes was festooned with appropriated machine guns!

Chris

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PostPosted: Thu Mar 17, 2005 17:31 pm 
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That would be the A/C .50 cal with a lighter barrel and a oil filled buffer, the M2HB had a heavier barrel which absorbed the recoil more so they did away with the oil in the buffer, however, this still didnt speed the gun up much more. The good thing about the HB was that it could sustain its rate of fire longer than the A/C version ( at ground level) due to the larger barrel which disipated the heat quicker.


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PostPosted: Thu Mar 17, 2005 17:45 pm 
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I am sure I have read somewhere about the Aussies adding the spring from a 36 grenade to the spring in Bren guns and upping the rate of fire, would something like this be a possibility? I imagine anything like this would increase the force needed to drive the bolt back and may cause problems of it not going far enough back to catch the sear and so "run away" or maybe not go back far enought to eject or chamber rounds. Im sure someone will explain if this is possible.

Alistair


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PostPosted: Thu Mar 17, 2005 21:27 pm 
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AB64 wrote:
I am sure I have read somewhere about the Aussies adding the spring from a 36 grenade to the spring in Bren guns and upping the rate of fire, would something like this be a possibility? I imagine anything like this would increase the force needed to drive the bolt back and may cause problems of it not going far enough back to catch the sear and so "run away" or maybe not go back far enought to eject or chamber rounds. Im sure someone will explain if this is possible.

Alistair


The spring in the .50 is pretty big anyway, but also uses a accelerator to help push the barrel and barrel extension back into place. If the spring was more powerful, the gun would still need the barrel and extension to be forced home, prior to the bolt locking.

The Browning M3 used a lightweight bolt which increased its rate of fire, but this didn't become a issued weapon until the closing stages of the war. This gun was sped up for aircraft and anti-aircraft use but could be converted to the HB configuration like the M2HB.


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PostPosted: Fri Mar 18, 2005 8:58 am 
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There are lots of 'unofficial' mods to weapons to improve their performance in the 'soldiers eyes'. Any of you 'older' boys that played with the SLR remember a modification with a matchstick to give you fully auto?

Chris

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PostPosted: Fri Mar 18, 2005 9:45 am 
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Location: Trying to work out why the GPO has the guns pointing the wrong way
Group: Garrison
nope but did add some silver paper for the same effect.

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"I'm with your lot B Company......B here when they go.....B here when they get back!"

Pte Pat Cleary ANZACS

Heard on VHF gunner net in Borneo in 1960's
US Accent: Unknown call sign this is USAF over North Veitnam clear this frequencey we're fighting a war here
UK Accent: USAF funnily enough so are we.....but we're winning ours!


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