Anyone have one on their ar? I'm talking about just the handguard. I've been considering getting one but I'm not sure yet.

Save yourself some cash and get the Airsoft version that comes in the bag (Classic Army?)! It is $50 with leaf sight, and IMHO better quality than an original USGI HG! You will want something to hang underneath! I have been there done that!

Airsoft all metal M203 sub $200 range
Real M203 sleeved to 37mm $2k-$3k range
Real M203 after transfer n fees $3k-$5k depending on brand and newness level!

Of course the state laws will dictate what direction you go!

You can't just hang 203 guards man, very uncomfortable, and the void screams to be filled!