The Gwyn & Campbell carbine, also known as the 'Grapevine Carbine", was the invention of businessmen Edward Gwyn and partner Abner C. Campbell and manufactured circa 1863-1864.
There were two types manufactured. Type I and Type II, for a total of 8,202 produced.
A main difference between the Model I and Model II Gwyn & Campbell carbines was cosmetic. Model I’s hammer and guard lever curved more than Model II and were considered more “serpentine.” Model II sported a flatter handle and a slightly-rounded lever. Also, the two models’ lockplate screws entered the lockplates at different sides: from the right on Model I and from the left on Model II. Pictured here is the Type II.
The U.S. Ordnance Department granted over a dozen contracts to Gwyn & Campbell
The breech end of the barrel is octagon and is fitted with a folding leaf rear sight graduated to 600 yards. Sling bar and ring on the left side of the receiver. The rear lock plate screw enters from the left side of the stock wrist. The hammer is flat with beveled edges and the lever is the shorter Type II pattern with the vertically mounted claw-like latch.
Many Calvary Regiments were issued the Gwyn and Campbell with a few being the 2nd and 3rd Arkansas; 5th, 6th and 16th Illinois; 3rd and 4th Indiana’s; 4th and 8th Iowa; 2nd, 6th and 14th Kansas; 10th, 12th, 14th and 40th Kentucky; 4th and 8th Missouri; 5th and 8th Ohio; 7th Tennessee; and the 3rd Wisconsin.