Working on my double dovetail MKI

[cal50]

I am claiming victory after battling with minor issues that makes the difference between a working gun and a paperweight.
I have learned a LOT about Bren's and the MKI during my build which will help me moving forward.


The fit , alignment and everything on my MKI go together smooth as silk yet I was having problems getting more than 5 shots out of it consistently.
That started with it being a single shot that when I made changes and thinking I solved the problem/s only to discover something was still not right.


My MKI has the original gas cylinder , piston and carrier that measure and fit as new. I know about the gas loss with the MKI and the change to the MKII gas cylinder but that was not any of my problem/s.

My biggest issue was getting the disconnector to reset consistently and not making a huge drag on my striker movement forward or aft.
I put a relief radius on the disconnector with reduced surface contact / drag that helped but still did not fix my problem.

What I learned from looking at the stock Bren carrier and lower frame is the original designed gun used a flat pad on the piston post bottom to trip / reset the disconnector for semi auto fire. When a striker block is added behind the carrier you are now eliminating that piston post resetting the disconnector and that role is now done by the striker block.

On my gun it took a fair amount or force to reset the disconnector which put drag on the striker / not good.
I isolated that function and extended the bottom of the piston post by the length of the striker block. I also slotted the bottom of the striker block to clear the disconnector.

This removed drag and any returned the reset function to the recoil cycle of the carrier and piston post , like the original gun.
BIG difference on my gun and function.

I used key 3/16" key stock and made the height the same as the stock piston post reset area~









Stock Bren disconnector reset function~




Stock with striker block added~





Extended reset area on piston post bottom~






Slotted Striker Bottom to clear disconnector~





NOT working~




After Mods....it.....is .....alive.