Table: ar15_variants_4
Columns: colt_model_no
name
stock
fire_control
rear_sight
forward_assist
case_deflector
barrel_length
barrel_profile
barrel_twist
hand_guards
bayonet_lug
muzzle_device

Question: Name the muzzel device with barrel twist of 1:10
SQL: SELECT "muzzle_device" FROM ar15_variants_4 WHERE "barrel_twist" = '1:10'

Question: Name the bayonet lug with ar-15 lightweight
SQL: SELECT "bayonet_lug" FROM ar15_variants_4 WHERE "name" = 'ar-15 lightweight'

Question: Name the hand guards for ar-15a2 government carbine and barrel twist of 1:9
SQL: SELECT "hand_guards" FROM ar15_variants_4 WHERE "name" = 'ar-15a2 government carbine' AND "barrel_twist" = '1:9'

Question: Name the barrel length for barrel twist of 1:7
SQL: SELECT "barrel_length" FROM ar15_variants_4 WHERE "barrel_twist" = '1:7'