Walkinboss,some modle 1865,1867and NM carbines came standard with front band swivels,i dont know what proportionthis was it makes me wonder weather carbines with band swivels were ment for artilary,same as british system no swivel for cavelry swivel for garison and artilary,someone might know anser,of all the NM carbines i have personly seen all had front band swivels but only one 1865 model with band swivel