BudsGunShop.com - good for left or right model?

Phil, yes, they will work and are equallly compatible with either a RH or LH Receiver's ejection port.

The grips will work just fine on either a right or left handed 870

to follow through the ejection port will not matter. As far as the grips are concerned neither the grip or forearm will block it (ejector port)on either side

the grips will work just fine on either a right or left handed 870 Since 1968 Hogue has manufactured everything from handgun grips, long gun stocks , AR components, specialty knives to gear and accessories. All share the same quality: Fit, function, superior performance and world-class design are hallmarks of the Hogue name.
Hogue OverMolded Shotgun pistol grips feature our new Tamer grip technology used on the Smith & Wesson 500. Hogue manufactures the grip used on the 500 which incorporates a special Tamer insert under the web of the hand. For those who have shot the 500 you know this grip works! The exclusive Hogue Tamer pistol grip features Hogues' famous orthopedic hand shape with compound palm swells and proportioned finger grooves and utilizes an internal Tamer recoil cushion that dampens the painful recoil of magnum loads.
Features and Specifications:
Manufacturer Number: 08715
Hogue Remington 870 Tamer Pistol Grip with Pillar Bed Forend Black
Overmolded
Orthopedic hand shape
Compound palm swells
Finger grooves
Pillar Bed Forend
Sorbothane cushion dampens recoil of magnum loads
Weight: 1.590
Color: Black
Fits:
Remington 870