CREATE TABLE "summary" (
  "colt_model_no" text,
  "military_designation" text,
  "barrel_length" text,
  "barrel" text,
  "handguard_type" text,
  "buttstock_type" text,
  "pistol_grip_type" text,
  "lower_receiver_type" text,
  "upper_receiver_type" text,
  "rear_sight_type" text,
  "front_sight_type" text,
  "muzzle_device" text,
  "forward_assist" text,
  "case_deflector" text,
  "bayonet_lug" text,
  "trigger_pack" text
);

Question: What is the trigger pack on the Colt 602 with the a1 rear sight type? 
SQL: SELECT "trigger_pack" FROM "summary" WHERE "rear_sight_type"='A1' AND "colt_model_no"='602';

Question: How many case deflectors are there for the Colt 646? 
SQL: SELECT COUNT("case_deflector") FROM "summary" WHERE "colt_model_no"='646';

Question: What is the rear sight type on the model with the acr muzzle brake device? 
SQL: SELECT "rear_sight_type" FROM "summary" WHERE "muzzle_device"='ACR muzzle brake';

Question: Which muzzle devices are on the Colt 603? 
SQL: SELECT "muzzle_device" FROM "summary" WHERE "colt_model_no"='603';