Hi. First post as a new member. I recently bought a m1a scout squad with a composite stock. I'll be shooting with iron sights onbly and want to replace my current handguard with the rectangular opening for the rail. I believe the part I'm looking for is # 1429180 and believe it was what the old Bush model came with (and likely other models as well). I've been unsuccessful so far in my search and would appreciate any help in locating one. Thanks in advance for any responses.