Go with the trojan and get the additional parts built onto that. The difference between the guns is a ambi safety, recoil master guide rod, magwell, and different checkering on the front strap. I have the sentry and changed the guide rod, and the magwell, so if i were to do it again i would have gone with the trojan and saved a few bucks. Don't get me wrong they are both great right out of the box, but if you plan on changing anything then go with the trojan