The same questions come up from time to time. Check out these two threads on different bag types and options.
Help Fairtex 8' Pole Bag!?!?
50 lb punching bag
I've gone the standing bag route in the past and it wasn't worth it for me as you'll read in the thread above. I came up with some options for hanging a bag in an apartment.
William
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New England Pekiti-Tirsia Pitbulls
Mongrel Combative Arts
www.mongrelcombativearts.com
All you need is love........and a sharp blade.....a hardwood flat stick......Oh, oh, oh and a Paraordinance lda 14.45 loaded with 230 grain hydra shocks,ranger SXT's or golden sabres