I have a Benicia Arsenal DCM carbine with the original bill of sale from 1929. Can anyone tell me how much the value of the rifle would be increased if I can prove that it was modified at the arsenal by cutting the length of the barrel to 22" and installing a Model 1903 front sight ( it says so on the invoice )? BTW the price was $3.50 for the rifle, M1907 sling for $1.31 and $.40 for a M1916 cleaning rod coming to a grand total of a cashier's check for $5.21. Any educated guesses would be appreciated as it is time for this rifle to move on. Thanks in advance.

'Charlie 33': Welcome to the KCA Forum.

As I stated, on the 'Military Surplus Collector's Forum', documented DCM/NRA 'carbines', with an actual Benicia Arsenal 'bill-of-sale', are pretty rare birds.

It would be helpful to Krag hobbyists to see clear & close-up pictures of your "DCM/NRA carbine" and related paper-work.

This would also help in establishing an accurate 'value range'.

Thanks! Looking forward to seeing photographs, especially of the front-sight/muzzle crown area, forearm tip, stock 'cartouche' & markings, and rear-sight.

IMHO - With supporting paper work and legitimate parts, I imagine your DCM/NRA carbine's value would be comparable to a model 1899 carbine in the same condition, ($600 to $900).

It is kind of an advanced, serious & knowledgeable collector piece. This model was made by a US. arsenal, but, lacks Military and historical use.
(It is a scary model for many collectors, because it is easily faked, and many people have been burned).

In my experience - A well done cut-down rifle, that is not a real (documented) Benicia DCM carbine, will get priced at $300 to $400, if bore, wood, and workmanship are real nice. They can be hard to sell.

Actual value of your Krag will depend on condition, condition, and condition.