By the spring of 1956 they had a near-final design, which was awarded a preproduction contract for 1,000 M18A1 claymores designated T-48E1 during testing.
By the spring of 1956, aerojet had a near-final design. It was awarded a pre-production contract for 1,000 M18A1 claymores, designated T-48E1 during testing.