Gaskiyar magana ta tabbatar da cewa amfani da rigunan kariya daga harsashi na iya rage asarar sojoji a yaƙi yadda ya kamata. Bugu da ƙari, a wasu ƙasashe, tsaron zamantakewa ba shi da kyau kuma akwai matsaloli da yawa na tashin hankali. Kare kai daga raunin kai yana da matuƙar muhimmanci ga jami'an 'yan sanda har ma da talakawa. Saboda wannan dalili, ƙasashe da yawa sun fara bincike kan kayan kariya daga harsashi da riguna na dogon lokaci. A lokacin Yaƙin Duniya na Ɗaya, an yi amfani da faranti na ƙarfe don kare ɗan adam, kuma daga baya an gudanar da bincike kan amfani da ƙarfe kamar aluminum da titanium. Duk da haka, a fagen fama, dole ne sojoji su ci gaba da motsi. Saboda kauri na ƙarfe da rashin ingancinsa na kariya daga harsashi, mutane sun fara nazarin wasu kayayyaki don cimma ingantattun tasirin kariya daga harsashi. Saboda haka, bayan Yaƙin Duniya na Biyu, rigunan kariya daga harsashi sun zama riguna masu inganci na kariya daga nau'ikan harsasai daban-daban. A halin yanzu, ya zama kayan kariya mai mahimmanci ga sojoji da 'yan sanda. A lokaci guda, ƙirƙirar kayan kariya daban-daban yana da matuƙar daraja kuma yana ci gaba cikin sauri a ƙasashe a duniya. Ana ci gaba da nazarin sabbin nau'ikan tufafin kariya daga harsashi kuma ana haɓaka su cikin nasara.

A halin yanzu, ana amfani da rigunan kariya daga harsashi don nau'ikan kariya guda biyu. Ɗaya harsasai ne daga bindigogi da bindigogi, ɗayan kuma harsasai ne daga fashewar abubuwa.

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Ka'idar hana harsashi ta riguna masu laushi ta hanyar amfani da harsashi mai hana harsashi ta ƙunshi cinye mafi yawan kuzarin kan harsashi (ko gutsuttsura) yayin aikin shimfiɗawa, yankewa, da lalata zare masu hana harsashi, wanda ke sa kan harsashi ya lalace ya kuma juya baya. A lokaci guda, wani ɓangare na makamashin yana canzawa zuwa makamashin zafi da sauti, yayin da wani ɓangare na makamashin yana wucewa ta zare zuwa yankin da ke wajen wurin tasiri, a ƙarshe yana naɗa kan harsashin da ya ƙare "ƙarfinsa" a cikin layin hana harsashi. Lokacin da ƙarfin zare masu hana harsashi bai isa ya hana harsashin shigowa ba, hanya ɗaya tilo ita ce a ɗauki nau'in kayan laushi da masu hana harsashi, wato, a ƙara ƙarfe mai tauri, yumbu ko kayan haɗin gwiwa a cikin rigar mai tauri mai hana harsashi, a haɗa hanyar hana harsashi ta kayan laushi da masu tauri tare: harsashin farko ya haɗu da abin haɗin gwiwa mai tauri a matsayin "layin farko na tsaro", kuma a lokacin aikin "haɗari mai tauri", harsashin da kayan hana harsashi mai tauri na iya lalacewa da karyewa, ta haka suna cinye mafi yawan kuzarin harsashin. Kayan kariya masu laushi kamar zare masu hana harsashi suna aiki a matsayin "layin kariya na biyu", suna sha da kuma watsa sauran kuzarin harsashin da kuma taka rawar hana harsashi, kuma a ƙarshe, suna samun tasirin hana harsashi. Rigunan hana harsashi masu ƙarfi samfuran farko ne waɗanda suka dogara kawai da kayan hana harsashi masu ƙarfi kamar faranti na ƙarfe don kariya, wanda ke haifar da rashin jin daɗi da ingancin tsaro. Yanzu an rage su sosai.