RE: Browning Gold versus Browning Silver
The Golds and Silvers differ in a few ways but, share their gas systems. The Silver is a collection of parts from the Browning Gold FLD (Classic), Fusion and the Winchester SX2. It's pretty much a Winchester SX2 with a little different look.
The Gold has the speed load feature, shims, and most have a magazine cutoff switch. The Silver has an angled receiver (Gold FLD Classic), triangle shaped safety button (Gold's), and a mid height rib (Fusion). Because it has the Winchester SX2's bolt and carrier it does not have the speed load feature or magazine cutoff. The Silver can use the FLD (Classic) shims and like the SX2 and SX3 can be tricked into have a magazine cutoff. Pushing up on the carrier slightly while pulling back on the bolt will block the rounds in the magazine.
The Gold's, Silver's, and SX2/SX3's are well made and reliable. They are easy to clean and can go longer periods between cleanings. They are one of the better designs for cycling a wide range of loads including light ones.