I myself would not alter an original in any way.But,thats just me.
I'd say "follow your bliss" on an aftermarket carbine.
IMO,the M-1 carbine is darn hard to improve upon.
On my aftermarket carbine I put an aftermarket replica of a GI folding stock to make it stash in my pickup a little better.
Without advocating altering an M-1 Carbine,one of the great sources of gun eye-candy was the older Gun Digests.John T Amber.60's and 70's.They did high grade color pictorials of custom rifles.
Beautiful custom rifles.
And,to my eye,the most interesting,elegant of these were Springfields,Mausers,and P-17/P-14's.
Its a bit sad to me that folks today have lost knowledge of how much those custom milsurps influenced the manufacturers of bolt action rifles .
The custom rifles made by gun cranks and the custom gunsmiths of the day led the way.
Had there not been the industry of converting milsurps...
In the first place,the import and availability of milsurps likely would not have happened.The rifles would have been scrapped.
Its the Bishop,Fajen,Timney,Brownells,Douglas,Clymer,etc economics that justified the sales of milsurp rifles.
Without the milsurp conversion industry,I doubt we would have some of the gunsmith schools,or cranky old gunsmiths.
Timney,Douglas,Shilen,Brownells,etc just would not have had the market to grow.
The crazy wildcatters would not have developed so many cartridges.
And I doubt the metallic reloading industry would be near what it is today.
No,I'm not advocating chopping original milsurps.
But,doggone,if somebody finds grandpa's stash of a couple of Brno 98's,aMexican 98, A p-14 with the ears ground off and prettied up,maybe even some 50 year old figured walnut blanks
We might set the judgementalism aside,remember the spirit of the "gun crank" and be thankful that someone values experience and creativity over what can be bought at the big box store.
I think we are better off with a few whackos walking around who can alter a bolt,chamber and headspace and thread a barrel,fit steel to wood,drill and tap a receiver without putting a hole in the chamber...
You get those skills by picking up some otherwise unused ...frankly,"junk" and having a vision.Then making that vision real with your hands.
That ,my friends,is disappearing,as our population allows those skills to become extinct.We become helpless.
Part of what protects the 2nd amendment,or,beyond the 2nd amendment,to the reason there is a 2nd amendment,
Is that guy with the file,and the chisel....
John Moses Browning did not have an elaborate shop,Iver Johnson made bicycles.Didn't Sam Colt whittle a wooden model of his revolver on a ship?
Too many people today substitute a quick draw MasterCard for these skills.Thats OK,free choice.But lets not sneer and put down the guy who can have a vision and create what he sees