Garretts are great carbines. Best bet is to go over to the N-SSA website,
www.N-SSA.org, and search the bulletin board. Lots of us shoot them in skirmishes and you'll find most of your questions answered there. Also, check Hahn Machine,
http://hahnmachineworks.com/index.html. Charlie Hahn specializes in getting Sharps repros and originals shooting their best.