Since its inception in 1948 the Arsenal Credit Union has been serving its members in the Arnold, Missouri area with exceptional financial products. You can find their current interest rates on used car loans, new car loans, 1st mortgage loans and interest rates on both fixed and adjustable mortgages here on these pages. Currently led by Linda Allen, the Arsenal CU has grown its membership to over 25,548 with assets of more than $227,293,778. They have a main office and 6 branch offices.