Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What kind of hand guards are associated with a rear sight of A1 and stock of A2?

### Inputs:
table_name: table, columns: ['Colt model no.', 'Diemaco model', 'Stock', 'Fire control', 'Rear sight', 'Forward assist', 'Barrel length', 'Barrel profile', 'Barrel twist', 'Hand guards', 'Bayonet Lug', 'Muzzle device']

### Response:
SELECT Hand guards FROM table WHERE Rear sight = A1 AND Stock = A2