Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_17832 ( "Colt model no." text, "Diemaco model" text, "Stock" text, "Fire control" text, "Rear sight" text, "Forward assist" text, "Barrel length" text, "Barrel profile" text, "Barrel twist" text, "Hand guards" text, "Bayonet Lug" text, "Muzzle device" text )

### Question ###
How many inches is the barrel length when the rear sight is weaver and the barrel profile is A2?

### Accurate SQL ###

SELECT "Barrel length" FROM table_17832 WHERE "Rear sight" = 'Weaver' AND "Barrel profile" = 'A2'