Which instruction allows for an ambidextrous selector lever on the rifle?

The correct answer is that the ambidextrous selector lever on the rifle is addressed by Modification Instruction 05538/10012A-OR-1A. This specific modification instruction outlines the guidelines and requirements for implementing the ambidextrous selector lever, making it easier for both left- and right-handed shooters to operate the rifle effectively. The inclusion of such a feature enhances usability and accessibility for a broader range of personnel, demonstrating a commitment to inclusivity and operational efficiency in firearm handling.

Other modification instructions do not pertain to the ambidextrous selector lever or may cover unrelated modifications. Hence, it is crucial to refer to the correct instruction that specifically addresses the features designed for ease of use across different users.