Recently, Accuracy International (AI) announced their two new rifle models: the AX MKIII and AX 50 ELR rifles. The new AX MKIII evolved from the AI’s multi-caliber AXMC rifle. The AX MKIII is chambered in .338 Lapua Magnum. The AX MKIII can be converted to chamber .300 WIN MAG and .308. While the AX 50 ELR rifle is an evolution of AI’s AX 50 rifle. The AX 50 ELR rifle is chambered in .50 BMG.