Jack is right, the installation was easy. The beam was supported by two trunnions on the cabin floor that picked up the aircraft structure. The beam had a motor that rotated it and pointed the pods in elevation. The weapons were mounted on a standard NATO rack on the beam ends, the beams could take about 1300 pounds apiece, enough for a good sized gun or a 19 shot rocket pod.
The main gear was bolted down on one early prototype version, but in the end, the retraction was maintained on all delivered versions.
The sighting system was mounted above the pilot's head, with a range/wind compensating feature and NVG compatibility.
The TOW kit used a mast-mounted sight and the CP station became a gunner's station, with a head's down sight.
The aircraft maneuvered well with the pods, and was quite accurate. It could hold an 8 man squad with the weapons, since the beam did not interfere with the seats.
The Philippine AF bought a squadron, many of them armed. The rockets that blew in Ferdinand Marcos' front door were fired from their H76 fleet, a convincing way to tell him that things were not in his favor anymore with the Air Force. He called for evacuation within a few minutes of that engagement.