This is 6-round side saddle is mounted on a Remington 870 with a police/military wood forearm. First, the 6-rd side saddle IS compatible with the shorter, police wood forearms (I was not certain when I ordered it). If you have a longer hunting style wood forearm, you will have to trim some forearm off (where it overlaps the receiver) or go with the 4-round model.
Installation was a breeze and took five minutes. The ammo carrier is held on by two bolts that replace the takedown pins (bolts and Allen wrenches included). If you tighten the bolts too much, your action will bind! Simply back the bolts off a little to resolve.
Overall, great way to carry ammo in a very ammo-deficient gun. Easy to access, still balances well.
Pros: Well built, no modification required.
Cons: None yet
This review was written in the old system and had content requirements that are different than reviews written today.