A modular gun rest has a mounting bracket assembly and a rest assembly. The rest assembly is removably attached to the mounting bracket assembly, which is in turn attached to a tree or other surface. The rest assembly has a camouflaged outer core, which may be constructed from polyurethane foam using a silicon mold, and an inner supporting element. The mounting bracket assembly and/or the rest assembly may include an articulating joint, and may be interchangeable with multiple rest assemblies, and vice versa. When assembled, the gun rest provides a stable, non-marring, and naturally appearing surface upon which to rest a gun. A hunter may affix multiple mounting bracket assemblies in the field, and may then use a single rest assembly in conjunction with the multiple mounting bracket assemblies. Additionally, the hunter may even be provided with multiple rest assemblies, according to the species of trees that are present.