I am building a semi auto L4 from a de-milled MKII receiver. I am in the process of fitting the ejector block and could use some reference pictures with the block installed please. It would be a big help! Thanks.
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I am building a semi auto L4 from a de-milled MKII receiver. I am in the process of fitting the ejector block and could use some reference pictures with the block installed please. It would be a big help! Thanks.
You shouldn't need pictures although someone will put them up. This is because the ejector block (make sure that you have the correct A2,3,4 et al ejector and NOT the early ejector block with an inbuilt hold open device) fits into the recess vacated by the old original .303" ejector and magazine catch and is retained by the same lateral retaining pin. All you need to do is to ensure that you mill clear the area surrounding the new ejector block so that it fits snugly into the body sufficient to clear it AND be drawn back a couple of mm's so as to align with the retaining pin.
You understand that the rear of this new ejector block is in fact the 'new' rear of the magazine well.
I notice that you haven't mentioned the fitting or geometry of fitting the 7.62mm Bren magazines into the newly machined FRONT of the magazine well yet. Before you start, let me tell you that fitting the 'commonwealth' pattern magazine to the L4A2 onwards guns gave the re-designers nightmares. Until someone came up with a simple solution...............
Since this is a re-weld, I am curious as to how well the ejector block should seat. Here is my progress so far. Just curious how much more material to the receiver I should add to make a good clean fit.
Here are the areas of concern
If the new ejector block sits on the original ledge, pulls back so as to align with the original transverse locating hole of the retaining pin, then all should be well. All of the ejectors seemed to be a 'generous' fit in the bodies, with a bit of slop.
Mine is at a press fit right now. The retaining pin lines up. Everything is a bit to snug right now. It will still be nice to see a reference pic as I am trying to recreate something. Thank you for your input!
I'm not sure that pics of an actual L3 gun will do anything C130 because the internals are different to yours in any case. Such as the magazine lip support/reinforce and ..........
Be warned. Your problems are only just beginning. Wait until you get to the front of the magazine well to accommodate the nose and front locking lug of said magazine!
Progress so far. Now if I can just get some reference pics for the tough part :help:
The magazine opening cover isn't right! It should slide further back and click shut on the same stop line as the old Bren. I seemk to remember that the L4A2 m.o. cover had an insert brazed in place. I only remember this because occasionally the insert used to fall out rendering the m.o.cover useless.
It's going to be a nightmare to describe the front portion of the magazine well. I'll try by quoting a few passages of my book BUT I'd suggest that you make an appointment with someone who has an A2 onwards gun and study it in depth
C310polit. Maybe you ought to look at the crimp nose blank thread for an offer made by CSM Archer.
Ah, yes........ There's the mag opening cover as it should be. Note the shortness and slightly different geometry. The L4 A2 on still clicks closed at the front end as per Bren but abuts against the new mag catch/ejector assembly as it does
No need for an insert as the L4 mag cover is just a shortened 303 item.Front rib flattened and then front and back profiled with the underneath front half round filed to make another 'ramp'Quote:
Originally Posted by Peter Laidler
https://www.milsurps.com/images/impo...52108689-1.jpg
ATB KG
Kevin, can you please give me an overall length? Per your example I will need to trim more off the front and end. I am also a bit confused by this "with the underneath front half round filed to make another 'ramp'". Are there any pictures available of the feed ramp air and the front mag catch area? The pictures thus far have been a really big help.
---------- Post added at 09:58 AM ---------- Previous post was at 09:52 AM ----------
[QUOTE=Brit plumber;263069]I dont know if you will find these of any use[QUOTE]
Could you please post a pic with your mag well cover in the closed position? :thup:
Attachment 43488Any ideas on the purpose of this relief cut?
Looks like BP beat me to it :) but will put up pic anyway.
You can roughly see how much to cut off the back (they vary) from pics so far as a starting point.
https://www.milsurps.com/images/impo...34c252a6-1.jpg
ATB KG
Looks like I just need the ramp at this point. I am getting ready to start the milling for the mag itself. I have the blue prints and some great refrence pictures . (fingers are crossed)
Thanks a bunch.
That relief cut that you show and describe is the remains of the mark left by the milling cutter slicing across the face of the magazine face after cutting the slot for the larger more substantial lkug of the 'commonwealth' front magazine lug. There'll probably be another similar mark on the other side
These areas look like they will be a bit tricky.
https://www.milsurps.com/images/impo...39bb54_z-1.jpg
royal armory library 391-1 by c310pilot, on Flickr
https://www.milsurps.com/images/impo...cc26e4_z-1.jpg
feed ramps by c310pilot, on Flickr
https://www.milsurps.com/images/impo...c5b451_z-1.jpg
DSC02181 by c310pilot, on Flickr
Is the purpose of this pin to retain the spring?
https://www.milsurps.com/images/impo...141011_z-1.jpg
royal armory library 421 - spring pin by c310pilot, on Flickr
Yes it is, Peter wrote a good article on this pin somewhere. Basicaly, they milled so far forward that they broke through into the spring recess so they simply (I say simply) inserted a pin to become the new base for the spring to sit on.Quote:
Originally Posted by c310pilot
As a side note regarding the pin ,the 303 (13 coil) barrel nut retainer spring will need shortening as a consequence to 10.5 coils (0.58 inch free length)
ATB KG
:thup:Quote:
Originally Posted by Kev G
How do you guys know all this stuff? Amazing amount of knowledge in this forum!!! I just finished machining the first mag well insert. When I get the second one finished I will post some more progress photos. Hopefully I will get it done before this weekend as I will be out of town.
How do I know this stuff? From my side of the equation, it's called experience C310pilot. Been my bread and butter since starting my apprenticeship as a real Armourer 50 years ago this year - in January 1963 and working on and with them ever since! But more importantly, now passing the info on...........
So here is some more progress. How critical is it to harden the inserts?
https://www.milsurps.com/images/impo...fc647c_c-1.jpg
IMG_8678 by c310pilot, on Flickr
https://www.milsurps.com/images/impo...4dded5_c-1.jpg
IMG_8683 by c310pilot, on Flickr
https://www.milsurps.com/images/impo...4c438e_c-1.jpg
IMG_8684 by c310pilot, on Flickr
I think that if you made them out of TOUGH material in the first place, that will do. The actual INSERTS only support the otherwise virtually unsupported magazine lips and prevent then from being destroyed.
Nice to see you making progress with yours. Mine is boxed and will probably get sold off before too long.
Cheers
Success! A nice tight fitting magazine.
I want to send a very special thank you to Kevin@Bren-Gun.com and Brian Dick for the reference photos. You guys really helped make this process a lot smoother.
I don't know why the video is not working correctly on this site. If you click the "watch on youtube" icon in the lower right it works.
Mag Fit - YouTube