well most of the CAPFs are structured , trained , equipped on the lines of infantry battalion
All CAPF are structured, trained and equipped considering a Company to be the basic brick which can provide what police calls a "column". The battalion has six companies and can take on additional "columns" under command. The support elements are missing but administration elements are to be provided under battalion HQ. Battalion HQ has hardly any operational of functional role.
CAPF is not trained and equipped as an "Infantry battalion" but as a reserve armed police force which is to be distributed down as per requirement. A force like CISF and CRPF have no logic to be structured or trained like Infantry.
Even border holding forces like BSF, SSB and ITBP are structured and trained to guard the border as a police force and perform policing duties during peacetime.
The basic task of Infantry in defensive operations is to hold ground against all forms of attacks including NBC attacks and in offensive operations to close in with enemy and destroy him with close quarter battle.
No CAPF is capable of fulfilling those roles.
So far as structuring goes all units / subunits of Infantry are structured and equipped down to a section on the basic need of "Fire and Move". CAPF is structured and trained to provide filling columns.
there duties are almost the same during war and peace time so logic dictates that they be equipped with ak 203
No CAPF brass agrees to that. I only wish it were so and the country could have a lot of Armed Forces as reserve and not like CRPF of 1962 which lost all posts during pre-assault probing operations of the Chinese aggression.
Even now after so much of modernisation no military commander can ever plan on some BSF or ITBP holding BOP in the face of enemy assault. It is counted as having gone ab initio. They can only function as a trip wire. They can only hold if mixed with Army platoon or company.
On the other side, Chinese and Pakistani paramilitary forces are structured , trained and equipped on the lines of Infantry and officered by military commanders.