CREATE TABLE table_17838 ("Colt model no." CLOB, "Name" CLOB, "Stock" CLOB, "Fire control" CLOB, "Rear sight" CLOB, "Forward assist" CLOB, "Barrel length" CLOB, "Barrel profile" CLOB, "Barrel twist" CLOB, "Hand guards" CLOB, "Bayonet Lug" CLOB, "Muzzle device" CLOB)

What is the barrel length for a cold model le6921sp?
SELECT "Barrel length" FROM table_17838 WHERE "Colt model no." = 'LE6921SP'
SELECT "Barrel length" FROM "table_17838" WHERE "Colt model no." = 'LE6921SP'