Ladies and Gentlemen, Buying a Remington 870 Express Tactical soon. Looking into the various accessory options and attempting to sort through them with people who have experience with them. Here is what I AM getting: 1. Pistol grip 2. Laser+light Here is what I was wondering. UAG sells a rail system slide with a vertical grip attachment in a package with all the bells and whistles. You can see it here: Amazon.com: UAG Remington 870 12 Gauge Shotgun Ultimate Tactical Conversion Kit: Six Position Stock + Shell Holders + Recoil Pad + Tri Rail Forend Pump + Light + Laser + Grip: Sports & Outdoors Now, my question is...do these install easily? (I mean, do I NEED a gunsmith to do it to make sure it is done properly) I also am looking at separate systems with just a small rail system up front and then adding a pistol grip slide, with the same question in mind. If anyone has any experience with these systems or can give me another opinion about my choice in accessories, it would be much appreciated.