If you have the Glock 30S, you will need to order the Glock 36 barrel. All of our Glock Barrels have fully supported chambers and you can shoot GOOD QUALITY reloads and lead bullets . If you buy a MT (Match Target) Barrel, it will NEED to be fit by a gunsmith. If you buy a SF (Semi Fit) Barrel, it may POSSIBLY NEED to be fit by a gunsmith. We do offer these fittings for an ADDITIONAL charge. All barrels shipped will require signature for delivery unless otherwise stated on the order form.