Semi Auto Bren extract problem

[locchau]

Vincent,

I have no luck with the ZB39 mag that I got. Its either not load the first round or only load and shoot the first one, two round at most then the bullet tip down into the mag. I oil the gun very well with break free CLP before and after shoot it, just clean it for pictures. Yes I use the same bolt for both calibers and it is the only bolt that I have. I just order PPU 174gr FMJ ammo from Aim Surplus, hopefully they will get here before Friday. As soon as the ammo get here, I will try it and will follow your comments if it still not working out. I’ll first try to polishing the .303 barrel chamber today after I get off from work before cutting the striker spring since I have tried to order a couple of spare from Mr. Savage but he don’t have any in stock. Anyone here have Historic Arms Bren with spare striker spring and one to sale one? I’ll be more than happy to take it. By what you said there is headspace involve on replacement of barrel, I probably hold off on that because I do not have any headspace gauge and don’t much about Bren to be able to do that by myself.

Joe and vincent, this is a dumb question but how do I disassemble the ZB39 mag. Is the bottom floor plate slide out just like AK or AR mag?

Loc Chau

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[Joe H]

Loc Chau.

On the top of the mag there is a little dimple. Press it down with the tip of a cartridge or small screwdriver. With it pressed down, slide off the top plate. It will only slide off one way, it's tapered.

Clean it out and oil it. My best guess is that the outside case is pushed in and its binding the follower. Check and be sure you can pull the follower up and down in the case by the spring without binding.

Another thing to check is the overall length of the cartridge. The ZB39 was made for a 8x56R which has a length of 75.91 mm. The 7.62x54R is 77.16mm. The ZB39 mags I have have ample clearance for the longer 54R round. Possibly your 54R is over length.

Joe