Feral hogs are a real problem in Texas! They destroy habitat and compete with native species and livestock. Javelina are smaller, native species that feed mostly on prickly pear cactus.
Although somewhat similar in appearance and habits, feral hogs and javelinas are not related. While feral hogs are indeed true pigs, javelinas belong to a totally separate family of mammals. Javelinas are smaller, have an unnoticeable tail, only one dew claw on the hind foot, a scent gland near the base of the tail, a grizzled-grayish coat with a white band of hair around the shoulder or "collar," and are more social or herd-like animals. Although feral hogs and javelinas inhabit the same range in South and Central Texas, they are not compatible.
Look for the differences in these tracks of the javelina, white-tailed deer and a feral hog.
This is a mount of a javelina my brother shot in south Texas a few years ago:
So what to shoot hogs and javelinas with? Javelinas can easily be taken with medium caliber weapons, from 5.56 in an AR-15 and pistols from .38 on up. It seems they are made perfect for bow hunting. Hogs, on the other hand, require something a bit heavier. I would not shoot one with a pistol smaller than a .357 Magnum, and I would want a heavier upper on my AR15 than the 5.56. An Ar10 would work, but the ideal upper for your AR15 would be the .450 Bushmaster or the .458 SOCOM.
Here is a site that has various AR15 uppers for sale. It gives an idea of the costs, etc. . . .
Added to my collection? Maybe!