The Model 1911
The model 1911 is synonymous with the .45 ACP cartridge. For an introduction to the 1911 read up on the 1911 Colt.
For interested (potential) users of the 1911, an introduction to the 1911’s conditions of readiness:
In this owner’s opinion, condition 2 is unnecessary and dangerous. Condition 1 and condition 3 are both preferred alternatives. – Jon