ATF FFL E-Z Check - Where I go to make sure the FFl you sent me is kosher.
Barrett Manufacturing - The guys who perfected the .50 BMG rifle. I sell this gun for cost in my shop, mainly because the government doesn't want you to have one, so I try to sell as many as possible.
Old Town Station Ltd. - Great old guns and a few modern one's. The owner, Jim "Jimmy" Supica, is one half of the talented duo that wrote the excellent reference book THE STANDARD CATALOG OF SMITH & WESSON. The other half being the equally talented but considerably more limelight-shy Rick Nahaus.
Smith & Wesson - Arguably one of the last good American gunmakers. Mainly because they are one of THE last American armsmakers.
Colt - Home of the $300 historical letter and very little else. Want a good .45? Get a Kimber. Want a nice AR-15? Get a STAG. Want a nice .38 Special? Out of luck, Colt doesn't make any .38's. Or .380's. Or .40 S&W's. Etc.
STAG Arms - Definitely a great product and the only maker of a left handed AR-15.
Sturm, Ruger & Co. - Not bad for a guy from Brooklyn.