[Rob_Watson]

Suggestions on a good belt holster for my Glock 21

[BenB]

I like this one:
http://www.fobusholster.com/products/GLOCK_20_21_37_38_PADDLE_HOLSTER-97-86.html

Good retention, close to the body and fairly inexpensive.

[JTQ]

Raven Concealment Phantom
http://www.ravenconcealment.com/

Garrett Industries "Silent Thunder"
http://garrettindustries.mybigcommerce.com/silent-thunder-holsters/

[mdauben]

I like this one:
http://www.fobusholster.com/products...TER-97-86.html
Another vote for the Fobus. The G21 is a bit chunky for IWB carry (at least I find it so) but if you have a loose fitting shirt, vest or jacket on this holster holds the gun snugly against your body and conceals well. Its really inexpensive, too.