When I was on active duty every time I was deployed I got the next weapon in the rack.

If I had a match grade M1, I would have chained it to my body. I guess that is the difference in being on a rifle team where the accuracy and feel of the weapon makes a difference and is more of a personal firearm.

I have seen some CW muskets with Regt, Company and rack (or soldier) number stamped on the musket. Most all are Yankee used and from regiments that were formed and armed in their home state. CS weapons with these markings are rare and usually reflect their militia use ID. I suspect the markings were made upon issue. One of the Yankee marked rifles is shown on the page I referenced in my first post.

Another example: Weapons of a Vermont regiment (9th?) were identified to the regiment by marking the regiment and company. There is a letter from one of the Company commanders where he states that he spent the day stamping the muskets (Enfields) and the next day they would mark the accouterments.

I have also seen some double marked CW weapons. It is true that some soldiers felt attached and personalized their weapons. Records on some of the owners of such guns show that one owner was killed, wounded or taken prisoner and the gun must have been picked up on the battlefield or re-issued to the second owner.

Once active campaigning started IMO there was little emphasis placed on official identification of arms. CW muskets did not have serial numbers like the pistols and carbines.

The closest thing to a serial number was the inventory number engraved on some Southern imported Enfields. Enfields marked in this manner are rare and seldom come on the market compared with unmarked Enfields. These marked muskets had the butt plate, bayonet and ramrod engraved with matching inventory numbers. Finding one of these with matching numbers on all three pieces is almost impossible.