Marines in itself a word comprises a very very special force that can do any job from highs of skies to bottom of seas and on land
In other countries Marines have weapons which none of other three forces even think of having
But in Pak it is different our Marines are tasked as security guards mostly with very little budget what navy gets Marines won't even get half of it they lack proper helicopters ships and amphbious ships and tanks
Few hovercraft they have but mostly navy uses them
Pak Marines should have dedicated gunship fleet as we are buying ATAK most of chunk army eats it Marines should be given proper share and authority over weapons like MI 17 are of lesser use to airforce than Marines C 130 should be given to Marines too AL KHALID tanks to save our shores from Indian invasion and few naval FRIGATES fully authorized dedicated under marine command autonomously
PAkistan Marines (PM) are treated like orphans because firstly of their history. Their past ops have been in shambles and the force was disbanded in early 70's. Then after approx 20 years, a need was felt to raise the force again.
The need of PM was felt in E-Pak due to terrain which required ops of amphibious nature and PA infantry battalions needed more training for that and were already short in numbers to fulfill other duties. So PM was born out of necessity of geography.
In W-Pak or Pakistan terrain now, an amphibious assault on India in case of war was not promoted by the PN. There were lack of landing craft, air cover, follow up supplies and other factors. So again the need was not felt until 1990's.
The area of Sir creek was managed by PA and when PN was expanding, a need was felt for a security force for Naval installations as trained sailors were needed on ships/subs etc. paramilitary forces like FC were not available for constant Naval guard duties as they fall under interior ministry.
Elsewhere in Pakistan, the geography didn't allow a regular amphibious force to conduct amphibious warfare. Whatever water obstacles that PA could face were managed by equipment given to Army Engineers. In plain words, no geographical area else than sir creek required an amphibious force or amphibious ops.
As soon as PM was made, Sir creek area was given as area of responsibility and Creek battalion was born, a defensive force to defend this area. A battalion sized force was considered enough to defend this area and another battalion sized force for security of Naval installations. The personnel shortage was solved by transferring personnel from Naval police. They were given Air Defence duties and trained on SAM systems.
Due to expansion of Naval installations and Gwadar port coming in the scene, a third battalion was inducted after 23 years of PM re-birth.
There is another factor to be considered here, any force/unit/ formation which has an officer posted in top brass is expected to be like a father to that force. This is a trend in Army, Generals look after their own parent units. PM born in 1990 had no high ranking top brass.
So a force born out of necessity for security and defence role is just given enough weapons to fulfill its duty in an effective manner. Recent amphibious exercises have shown that the force has potential to be expanded in its roles and can also take on offensive ops, but a requirement of such an ops is doubtful.
PM would have been a bigger force with heavier weapons and tech, if there was no other way for enemy but conducting an amphibious assault by enemy was the path of attack on Pakistan and ground assault chances were negligible. However that's not the case so adequate measures have been taken to defend against an amphibious/ground assault in creek region.
Pakistan doesn't invade other countries through an expeditionary force or amphibious force unlike US Marines. The coast line is small to defend also. PM is still capable of an amphibious assault to a certain degree.
Circumstances can ofcourse change if PM is made an offensive force and is expected to cross the border in case of war and operate/advance in enemy territory. So far that's the job PA.