Veriforce Tactical’s two piece drop in AR 15 rail systems are easy to install. The hardest part in swapping these for your standard GI handgaurds is taking the GI handgaurds off. The GI handguards are plastic with ribs and holes in top and bottom. Most of the AR15 drop in rail systems are in 3 colors; anodized black, Magpul flat dark earth, and Magpul OD green. All of the rail are mil-spec. To remove your standards GI handguards are very simple. Just pull back on your delta ring, then with a flat head screw driver, split apart the handgaurds horizontally. Then pop in your new rail system and your done! Again, we are here from 9-5 Mon-Fri pacific time to answer any of your questions.