Type1 Hand Phaser

 This is a small hand unit, approximately the size of a pack of cards. They can fire up to Setting 8, which causes total vaporization of humanoids as 50% of affected matter transitions out of the continuum. 

Type 2 Hand Phaser

This is a larger hand unit. Early models of the type 2 Phaser used a type 1 Phaser clipped into a pistol grip, but modern weapons seem to have little in common with the smaller model. The modern type 2 Phaser can fire up to setting 16, which causes the destruction of some 3,900 metric tons of rock per 0.28 second discharge

Type 3 Heavy Phaser Rifle

The type 3 is a rifle version of the type 2 Phaser. It uses a nearly identical "business end" as the type 2, and is also capable of firing to setting 16. The advantages of the type 2 are a 50% greater energy reserve, a multiple target acquisition system and a gyrostabilizer system. Recently the standard type 3 Phaser rifle has apparently received the same advanced targeting system as the Heavy Phaser rifle. 

Compression Rifle

When the Dominion threat became urgent in late 2370, Starfleet decided to issue its forces with a new class of heavy rifles to increase the firepower available to them. The Compression rifle concentrated on simplicity. The discharge crystal was doped with arsenic atoms and trisilinate molecules in order to restrict the phaser energy discharge. limiting or compressing the beam to a maximum of 200 picoseconds of firing. This would fire the entire energy discharge in a beam of only 6 centimeters length, greatly increasing the intensity of the energy and so enhancing the effect on the target. 

The photon grenade is a short range weapon intended for general use against a variety of targets. The grenade can be fired from a standard tube launcher, beamed to the required co-ordinates, or thrown by hand - although the latter is only suitable for grenades on a low yield setting due to the proximity of the user to the detonation

Phaser Mark 2-D

 A supplementary hand weapon for marine usage that would be capable of operating as a main weapon for troopers without a rifle. Design goals stated it should be able to duplicate the firing rate of the Jem'hadar weapons and allow area saturation fire against hard to locate targets without any loss of stopping power. The design should be easily maintained and modular in design to allow fast repair on the field with spare modules.