Psst! Ithaca Model 37. (shh....) 
(I have a nice 870 too...)
specs:
-early 870 Express magnum that isn't magnum marked.
-no J lock.
-anodized aluminum trigger group.
-Remington 870P furniture.
-Parkerized and duracoated field grey.
-20" cylinder bore bbl with rifle sights.
-Choate steel mag tube extension.
-Uncle mike's lefty safety. (I'm a lefty).

(I have a nice 870 too...)

specs:
-early 870 Express magnum that isn't magnum marked.
-no J lock.
-anodized aluminum trigger group.
-Remington 870P furniture.
-Parkerized and duracoated field grey.
-20" cylinder bore bbl with rifle sights.
-Choate steel mag tube extension.
-Uncle mike's lefty safety. (I'm a lefty).