Currently, the British Army maintains 29 M270 MLRS platforms, ... The ex-Norwegian M270s are currently in storage in the UK before being sent to the US for an upgrade, likely to the A2 standard.

If approved by Congress, Bahrain-operated M270 MLRSs would be upgraded to the M270 A1 configuration. The US State Department on 24 March announced its approval of a potential $175.98 million FMS deal ...

The M270A2 is not just a modernization—it’s a full-force return of one of the U.S. Army’s most formidable long-range artillery systems. Originally developed during the Cold War, the M270 ...

At this position, A1 has a histidine amino acid, while A2 has a proline amino acid. The entire basis of the supposed problem with A1 milk is its pesky histidine amino acid at position 67.