Frontgrade Technologies Inc., Exeter, New Hampshire, is receiving modification number P00010 to a previously awarded indefinite-delivery/indefinite-quantity, firm-fixed-price contract (N00039-18-D-0004). This modification increases the value of the basic contract by $94,107,423 to a new total contract value of $115,850,904. This modification allows for the continued procurement of OE-570 ultra-high frequency antenna systems variants, subassemblies, Mobile User Objective System upgrade kits, system spares, engineering services, and training to fulfill antenna requirements for the Digital Modular Radio Program on various surface ships. This contract was not competitively procured because it is a sole-source acquisition pursuant to the authority of 10 U.S. Code 2304(c)(1) – Only One Responsible Source (Federal Acquisition Regulation subpart 6.302-1). Work will be performed in Exeter, New Hampshire, and is expected to be completed by Dec. 16, 2027. No funds will be obligated at the time of modification award. The Naval Information Warfare Systems Command, San Diego, California, is the contracting activity (N00039).