You have to remove it or it will shoot out with the slug. It is great for shooting 410's but less than desirable for shooting 45's. However, in a pinch it is a good backup with 45’s. TC has to put the "45" on there so it is legal to sell. If you want a 45 or 44 single projectile shooter, buy just that. But I have to tell you the 410 is very fun! I shot over 40 rats with one while I was mowing the back pasture on the tracker. A lot easier that using a 22LR.

Duane