The Model 1840 Flintlock Musket was developed at Springfield Armory. The .69 caliber Musket had a 42″ gun barrel, an total length of 58″, and a weight of 9.8 lbs. Over 30,000 were fabricated by the Springfield Armory.

Springfield Model 1840 Flintlock
The Model 1840 constituted a small advancement over the Springfield Model 1835 musket, and therefore wasn’t dramatically dissimilar from the older Model 1835. The Model 1840 sported a longer bayonet with clasp and a stock with a comb. The architects of the Model 1840 expected that the musket would sooner or later be rifled, and constituted the barrel heavier than the previous Model 1835. The respective alterations to the Model 1840 made it somewhat heavier than the Model 1835.
The Model 1840 constituted the final flintlock musket developed at Springfield Armory. And more of them got changed over to percussion lock prior to arriving to the battlefield. Tho’ developed as a unrifled musket, most of the Model 1840’s underwent the barrels rifled later on and were changed over to percussion cap muskets.