Eleventh Supplemental Indenture, dated as of September 27, 2018, among L3 Technologies, Inc., The Bank of New York Mellon Trust Company, N.A., as Trustee, and the guarantors named therein

ELEVENTH SUPPLEMENTAL INDENTURE (this “Eleventh Supplemental Indenture”), dated as of September 27, 2018, among L3 Technologies, Inc., (formerly known as L-3 Communications Corporation) (or its permitted successor), a Delaware corporation (the “Company”), each direct or indirect subsidiary of the Company signatory hereto (each, a “Guaranteeing Subsidiary”, and collectively, the “Guaranteeing Subsidiaries”), and The Bank of New York Mellon Trust Company, N.A., as trustee under the indenture referred to below (the “Trustee”).

WHEREAS, the Company and the Guaranteeing Subsidiaries party thereto have heretofore executed and delivered to the Trustee (1) an indenture dated May 21, 2010 (the “Base Indenture”), (2) a first supplemental indenture dated as of May 21, 2010 (the “First Supplemental Indenture”), providing for the issuance of $800,000,000 4.750% Senior Notes due 2020 (the “2020 Notes”), (3) a second supplemental indenture dated as of February 7, 2011 (the “Second Supplemental Indenture”), providing for the issuance of $650,000,000 4.95% Senior Notes due 2021 (the “2021 Notes”), (4) a third supplemental indenture dated as of November 22, 2011 (the “Third Supplemental Indenture”), providing for the issuance of $500,000,000 3.95% Senior Notes due 2016 (the “2016 Notes”), (5) a fourth supplemental indenture dated as of February 3, 2012 (the “Fourth Supplemental Indenture”), providing for the accession of certain Guaranteeing Subsidiaries, (6) a fifth supplemental indenture dated as of May 28, 2014 (the “Fifth Supplemental Indenture”), providing for the issuance of $350,000,000 1.50% Senior Notes due 2017 (the “2017 Notes”) and the issuance of $650,000,000 3.95% Senior Notes due 2024 (the “2024 Notes”), (7) a sixth supplemental indenture dated as of June 21, 2016 (the “Sixth Supplemental Indenture”), (8) a seventh supplemental indenture dated as of October 31, 2016 (the “Seventh Supplemental Indenture”), (9) an eighth supplemental indenture dated as of December 5, 2016 (the “Eighth Supplemental Indenture”), providing for the issuance of $550,000,000 3.85% Senior Notes due 2026 (the “2026 Notes”), (10) a ninth supplemental indenture dated as of March 29, 2018 (the “Ninth Supplemental Indenture”) and (11) a tenth supplemental indenture dated as of June 6, 2018 (the “Tenth Supplemental Indenture” together with the First Supplemental Indenture, the Second Supplemental Indenture, the Third Supplemental Indenture, the Fourth Supplemental Indenture, the Fifth Supplemental Indenture, the Sixth Supplemental Indenture, the Seventh Supplemental Indenture, the Eighth Supplemental Indenture, the Ninth Supplemental Indenture and the Base Indenture, collectively, the “Indenture”), providing for the issuance of $800,000,000 3.85% Senior Notes due 2023 (the “2023 Notes”) and the issuance of $1,000,000,000 4.40% Senior Notes due 2028 (the “2028 Notes”, together with the 2020 Notes, the 2021 Notes, the 2016 Notes, the 2017 Notes, the 2024 Notes, the 2026 Notes and the 2023 Notes, collectively, the “Notes”), effecting certain amendments to the Indenture;

WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiaries shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiaries shall unconditionally guarantee all of the Company’s Obligations (as defined in the Indenture) under the Notes and the Indenture on the terms and conditions set forth herein (the “Subsidiary Guarantee”); and

WHEREAS, pursuant to Section 9.1 of the Indenture, the Trustee is authorized to execute and deliver this Eleventh Supplemental Indenture.

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: