A portable, mobile suit-use 90mm rifle built based on the 'system weapon' structure, its effective range and accuracy is superior to the HWF GMG·MG79-90mm ...
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RGM-79N Atomic Heavy Armor GM Custom | The Gundam Wiki - Fandom
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The RGM-79N Atomic Heavy Armor GM Custom, also known as the AHA-GM-C is a variant of the RGM-79N GM Custom that appeared in Mobile Suit Gundam 0083 Rebellion.