Zero Retention Force Arming Unit The Zero Retention Force Arming Unit ( ZRFAU ) is an electro mechanical device used on military aircraft bomb racks to arm munitions as they are released from the aircraft . EDO MBM Technology Ltd are sole owners of the proprietary rights to one such unit and act as technical support and design authority for its ongoing use and installation . The units are used in U . S . Navy BRU - 32 , BRU - 41 , BRU - 42 , BRU - 45 , the US Air Force BRU - 46 & BRU - 47 , the Royal Australian Air Force MAU - 12 , the European Tornado HMERU & LMERU bomb racks . Since at least 2012 the ZRFAU has been in operational use on the General Atomics MQ - 9 Reaper drone . The latest MQ - 9 bomb rack the BRU - 71 is made by EDO MBM parent company ITT Exelis and utilises the ZRFAU as an essential part . The ZRFAU is also used in the Israeli Military Industries ( IMI ) VER - 2 Bomb Rack , a bomb rack also owned by EDO MBM Technology Ltd , and currently advertised for sale by a subsidiary of Elbit Systems Ltd in Israel . , for the Israeli Air force F - 16 . Following investigations by campaigners into EDO MBM ' s links with Israel , and the submission of documents showing these links in court as part of a defence of Palestine Solidarity protesters , EDO MBM removed from their website a reference stating it was ' actively manufacturing ' ZRFAUs , claiming this statement had been ' an error ' . Directors of EDO ( UK ) Ltd , the holding company of EDO MBM admitted that a US subsidiary , Artisan Technologies , in New Jersey , did manufacture the component supplied to Israel . This subsidiary was 100 % owned by EDO UK from 2000 until it was sold in 2008 . Despite the sale of the company officially manufacturing the ZRFAU , EDO MBM continued to be the sole point of contact for sales and technical support for the component until 2012 when all references to the comaponent were removed from the ITT Exelis website . In November 2009 the Information Tribunal looking at EDO MBM ' s export licence applications held by the Dept for Business ( BIS ) found “ There was no dispute that the ERU151 and the ZRFAU are components which can be incorporated into VER - 2 bomb racks for use with F - 16 combat aircraft , that those aircraft are used by the Israeli air force , and that from 1998 EDO owned the right to manufacture the ERU151 and the ZRFAU . ' " But " After examining the documents , it concluded the information did not confirm claims that EDO supplied Israel , and therefore the documents should remain confidential . It was then established that EDO MBM ' s involvement with the design , development , technical support and supply of the ZRFAU had been taking place without any apparent UK export controls , in an apparent breach of UK legislation . In June 2010 in the EDO Decommissioners Case a jury of twelve members of the UK public acquitted seven people of conspiracy to cause £180 , 000 criminal damage to the EDO MBM factory , on the grounds that their belief that EDO MBM had been supplying Israel with the ZRFAU at the time of Operation Cast Lead and by extension their belief that EDO MBM were complicit in war crimes carried out by Israel against the people of Gaza was a reasonable belief . It followed that it also reasonable to damage the factory to the tune of £180 , 000 in order to try and in some small way stop these Israeli war crimes and protect Palestinian property . Even Paul Hills , the Director of EDO MBM , had accepted during the trial that the activists belief was ' not unreasonable , ' in light of all the documents that appeared to establish the fact , although as in previous sworn testimony over five years , he continued to deny any such involvement .