Shop › LUTH AR 223/5.56 A1 BIRDCAGE LUTH AR 223/5.56 A1 BIRDCAGE $12.17 Luth-AR A1 Birdcage, Compensator/Flash Hider, 223 Remington/556NATO, Fits 1/2X28, Manganese Phosphate Finish, Black BL-06-A1 Quantity: Add To Cart Added! Luth-AR A1 Birdcage, Compensator/Flash Hider, 223 Remington/556NATO, Fits 1/2X28, Manganese Phosphate Finish, Black BL-06-A1