The Camp at Montauk Point (near N.Y.C.) was where volunteer regiments were quarantined, before shipping them home, (following the Cuba and Puerto Rico campaigns).

At Montauk, government property (like model 1896 carbines and Krag rifles) was turned-in and accounted for.

A lot of city people came out to see troops, especially, the famous 'Rough Riders'.

(IMHO- The troopers were probably loaned some 'trap-door' Springfield rifles to put on a show for the public).

With The well connected "T.R." as Colonel, the 1st US Vol. Cavalry received their Krag carbines while being formed in San Antonio, Texas.