This is a very fine original Model 1866 US breechloading rifle with the Allin Conversion, a.k.a. the Second Model Allin “Trapdoor”. In 1866, the Springfield Armory altered existing M1863 percussion muskets to a .50 caliber, centerfire rifle and employed the distinctive ‘trapdoor’ breechblock loading system. The 2^nd Model differed from the First Model by using a longer bolt, a firing pin spring and a stronger internal extraction system that dispensed with the rack and pinion type. Some 25,000 M1863 muskets were altered by the armory in 1866.  Breechblock is stamped “1866” over an eagle’s head at the hinge. Lock marked in front of hammer with spreadwinged eagle and “U.S. / SPRINGFIELD”. 

Rifle’s lined barrel measures 40” long and retains a factory bright finish.  Has three-barrel bands with band springs. Steel ramrod has the ribbed and slotted head.  No case colors remain.  All metal surfaces smooth and show no pitting or oxidation.  Lockplate and hammer exhibit a dull gray color. Mechanics crisp. Bore is clean, strong and bright. The walnut stock exhibits a rich, dark patina with scattered minor dings, dents and nicks as normal with age and use. A fine strong cartouche is stamped on the left side behind the lockplate screws.   All mountings standard including the stacking swivels at the upper band and the sling swivel at the lower band.  Regulation front sight blade.  A very fine M1866 rifle. 

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