CREATE TABLE table_name_87 (us_krag_jørgensen_m1892 VARCHAR(255), norwegian_krag_jørgensen_m1894 VARCHAR(255))
What is the US Krag-Jørgensen M1892 when the Norwegian Krag-Jørgensen M1894 is 126.8cm?
    
SQL: SELECT us_krag_jørgensen_m1892 FROM table_name_87 WHERE norwegian_krag_jørgensen_m1894 = "126.8cm"