The only FN-49's I've ever seen with flash hiders are the Venezuelan 7x57's. Numrich does have a clamp-on grenade launcher that fits 30-06 models I think.
Finally, M14 10-round stripper clips work great with a 30-06 model.
Smith, and Wesson, and Me. -H. Callahan
Well waddaya know, one buwwet weft! -E. Fudd
All bad precedents begin as justifiable measures. -J. Caesar