Quoted:
I'm looking for a handguard that extends past the front sight on my M4.  My goal is to mount my Magpul AFG directly under the front sight.  I don't really care if it extends far enough to have a rail in front of the front sight, such as the Troy Delta, or if the rail stops at the front of the front sight tower, such as the DD Lite Rail FSP.  I've looked at the offerings from Troy and DD.  Am I missing any other options?  Is there much a difference between manufacturers in the overall diameter?  I'd like to have as narrow of a grip as possible.  Thanks for any info!