I cannot speak to the issue of weapons from depots to regiments as I was never the QM. The many times I drew weapons from the unit QM, the rifle or SMG usually had a sling fitted. Breech block, bayonet with scabbard and frog, cleaning kit, blank firing adaptor were issued from a pile or box as needed. As I recall the QM had inventories e.g. Rifles FNC1A1 (by SN) 200, then simple quantities e.g. bayonets C1 198, slings C1 206, BFAs C1 176 etc. In theory the quantities should have matched. ;-)
The rifles C No. 7 .22IN MK.I that 583 Sqn Royal Canadian Air Cadets had were issued to us without their wooden chests and cleaning tools were minimal. No bayonets of course!
Our QMs had a tendency to not issue out a lot of weapons' accessories due to the work involved and the hassle when parts were lost or broken.
There have been times in the past when bayonets were serial numbered to the rifle. This was common in other countries but far less so in
Canada
. There are times we could have used it. Whenever a fellow lost his bayonet on exercise, he simply stole one from another soldier. The hapless smuck at the end of the line ended up paying for it as his stolen bayonet could not be identified.
In the old days (e.g. 1920s) Canadian regimental markings sometimes included a number on the bayonet and scabbard. I missed out in such an example from my regiment (SHC) at our most recent gun auction, but I do have a regimentally numbered one from another local regiment (1st Bn BCR).
The Lee-Enfield No.4 Mk. 2 apparently came with a serial numbered No. 9 bayonet (socket and blade design, with a scabbard but no frog). Of the two that I have owned in the past, one bayonet was mismatched (Irish contract rifle, Burmese contract bayonet as I recall) and the other one, RAF Contract, was left along with the rifle in its factory greased paper wrapping. Once in general issue I suspect a lot of bayonets would quickly become orphaned from their matching rifles.
Surprisingly the Soviets numbered their bayonets to their rifles in WWII. A year ago at a gun store I helped a fellow customer who was looking to buy a Mosin 91/30 rifle. Once he had decided to buy one, the clerk, instead of taking one off the rack, went into the basement and brought up a mint 91/30 rifle with matching numbered bayonet!