While I have never been a serious collector of military antiques, I recently was offered the chance to purchase a Bren MK1 (M) dated 1943 and produced by JI in Toronto.

During the course of firing the weapon (without doing much research beforehand,) I noted the fired cases (.303) had ballooned so much in the breech it took quite a bit of effort to eject the fired case(s.) Of course, afterward, I realized the barrel did not have the necessary gas regulator which I noted on another fellow's Bren.

Using the other fellow's regulator and barrel, I found the weapon performed flawlessly.

My question(s) are such...

1. Were the ballooned cases the result of not having the regulator installed, or is the existing barrel to blame?

2. Should the barrel be the culprit, where is a good source for replacement Mk1 barrels?

3. Since I currently have a MK1 barrel, though the serial numbers on the receiver and barrel do not match, will the mis-matched serial numbers have much effect on the weapon's value?

I am so pleased to have found this forum. I have grown quite fond of the weapon during the short time she has been in my possession and plan to have her with me for a very long time.

Thanks to any of you who may take the time to help.

Bob
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