Even a cursory review of the extractor device included on third and fourthgeneration Glock pistols reveals that it does not “plainly indicate” when a cartridgeis in the firing chamber. Two manuals for Glock pistols, attached as exhibits to thecomplaint, show images of the extractor. See Add. 19, 23.21 From those images, itis difficult to discern the difference between the position of the extractor in theloaded and unloaded positions. See id. The imperceptible protuberance on the sideof the pistol does not obviously signal to users when the gun is loaded, especially 21 These documents, cited in the Addendum, were attached as Exhibits 42 and43 to the complaint, and are included on pages 174-a through –f of theSupplemental Joint Appendix. For ease of reference, the Attorney General has alsoincluded them in her Addendum. when compared with other handguns’ load indicators that use, for example, coloredwarnings, textual warnings, and pins that protrude conspicuously. See, e.g., Add.9–10, 14, 17.22 For that reason, the Glock extractor is unlikely to effectively guardagainst the accidental handgun discharges Section 16.05(3) seeks to prevent.The dealer plaintiffs complain that the AGO’s letters did not explain why aGlock pistol’s extractor does not qualify as a load indicator. Appellants’ Br. at 46,50. But as explained above, the answer is self-evident.