Big, but versatile - Sniper AR Style 2 Piece Front End Rail Length, FN/FAL Tri Rail Handguards

This is a great entry-level way to get a rail on your FAL for a great price. Installation is easy and takes about two minutes. Remember to apply whatever durable rust preventative you prefer to the barrel first, as this isn't a part youre going to take off every time you clean the rifle. Also, its a good idea to grease the eear handguard ferrule to ensure smooth and consistent fore and aft travel of the rail system as the barrel heats and cools (like an M-14). Blue loctite is adequate for all screws involved, and don't over-torque the front attachment screw. Pretty intuitive part, which is good, because mine came without instructions. My only complaint is that the svelte forend of a normal FAL is gone once you apply this rail. The tradeoff is fair, though, as you get miles of rail space. Great value for the price.