[SIZE=+2]"Arms of the Mexican Infantry 1835-1836[/SIZE]
[FONT=Arial,Helvetica][SIZE=-1]by Ed Dubravsky[/SIZE][/FONT]
[SIZE=+2]W[/SIZE]hen Mexico won its independence from Spain, the fledgling country found itself with a large supply of Spanish weapons. By the time of the Texas Revolution there were still thousands of Spanish weapons in the armories of Mexico. Since Mexico had no major facilities for producing the additional weapons necessary for its army, it subsequently procured arms from other sources. Available records show that they possessed a number of arms orginating from different countries including the United States.
In the mid 1820s Mexico bought a large number of British arms and issued these to its regulars and active militia battalions. It's doubtful that Mexico used any weapons other than those supplied by the British during the Texan campaign because weapons standardization for the purposes of supply and spare parts was a vital issue.
Though there exists no precise description of these arms, some evidence has surfaced through archaeological research. This evidence suggests that Mexico armed its infantry with the India Pattern musket, a 39 inch barrel of .752-.760 caliber. It weighed nine pounds, eleven ounces and came with a seventeen inch socket bayonet that itself weighed one pound. In essence, it was a cheaply made version of the famous "Brown Bess". It was not subject to the same rigid standards and testing as the usual army muskets and many of these were quite inferior."
The battle of the Alamo was in 1836, which predates percussion caps, which I think were invented in 1836. At any rate, it looks like the Mexican Infantry was armed with the Brown Bess musket at the Alamo. I've owned an original India pattern Brown Bess, and other than the barrel and lock markings, I couldn't see much of a difference between it and the musket the British issued their own troops, although at the time I wasn't really looking, and I didn't have the guns side by side, I owned them at different times. That's beside the point, there are plenty of reasons that Brown Bess musket balls could be found in Texas. Approximately 1500 Mexican troops attacked the Alamo.