My family had a gunshop from 1990 to 2004, and back around 1991/92 (?) we were buying quite a few "unissued" Longbranch No 4s. I believe they came from Districorp. We went through about 30 of these rifles, the majority dated 1950. There was one dated 1949 that I had set aside for myself, and it was accidentally sold. While we were bringing these in, some consecutive numbered sets became available, so we brought 3 sets in and couldn't get anymore. The pair I grabbed still have the Department of National Defence inspection tags tied onto the front sling swivel. Bayonets and slings came with the rifles, and many of the bayonets were in a green paper wrapper. From what I recall reading, Long Branch produced around 5000 rifles in late 1949 and 1950. These rifles all had 5 (I think?) groove barrels instead of the 2 groove barrels. I understand that when the plant was shut down in 1945, the rifling equipment was sold off and when they reopened, Bren gun equipment was used for rifling.
The rifles were in almost new condition, all with dark stocks. The wood had various bangs and dings, and some came through with minor repairs. I believe the stamped out CMk III rear sights came on these rifles.
Some of the floorplates/trigger guards were stamped and some were machined. This makes me think that many of these rifles were made from both new and left over parts inventory that happened to still be sitting around. Many of our customers shot these rifles and they were all very happy with the accuracy.
I still have my consecutive numbered pair and a single rifle. I plan on keeping them, too.