Your Remington
might be a copy of the Remington-Beals revolver.
It is the one on the right in this photo
Notice how the frame comes back almost reaching the face of the cylinder.
The frame on the New Model Remington shown on the left is away from the face of the cylinder exposing the threads on the barrel which extend almost to the face of the cylinder.
Even if your gun is not a reproduction of the Remington-Beals perhaps you might be interested in a bit of history.
The Remington-Beals was actually designed and Patented by Beals in 1858 (hence the name "1858).
The .44 caliber Army version was first made and offered to the Army as the "Remington-Beals Army Model" in 1861 as competition for the Colt 1860 Army.
The Army did extensive testing of the new Remington and rejected it because the cylinder would lock up after a few shots were fired due to fouling on the frame and the face of the cylinder.
Remington redesigned that area to provide clearance between the frame and the cylinder creating the Remington 1861 Army which also featured a cylinder pin that could be slid forward without lowering the loading lever. The Army rejected this version because the pin could slide forward as the gun was carried in a holster thereby allowing the cylinder to fall out on its own.
Remington again redesigned the pistol and called it the Remington New Model Army in 1863.
The Army liked it and the war was raging so thousands of the guns were ordered.
The Remington New Model Army was made from 1863 to 1875 an estimated 122,000 being manufactured.