Assistant Commandant (AC), equivalent to Assistant Commissioner of Police (ACP) / Deputy Superintendent of Police (DSP)/ Captain in Indian Army is a Group-A Gazetted Officer rank in the Central Armed Police Forces of India.
ACs in Central Armed Police Forces are appointed directly through UPSC selection process and are called Directly Appointed Gazetted Officers (DAGO). These officers can reach up to the rank of ADG in their own organisations without having conferred to the Indian Police Service.
Apart from performing various decision making and supervisory functions, similar to any other Group ‘A’ service, the executive officers of the CAPFs perform several other managerial functions peculiar to the service, besides leading the troops in the field. The directly recruited officers start assuming the charge of a company (cutting edge armed formation each with approx 136 strength) by their own after a maximum of one and half years since stepping into the academy for basic training. Their role and performance, therefore, assumes a great significance due to the special features of an emergency force which is pressed in aid to civil power to perform multiple roles in extremely difficult situations.
The intake of officers at the level of Assistant Commandant is 50% through direct recruitment from open competition, 33% by promoting Inspectors and remaining 17% through Limited Departmental Competitive Examination (LDCE), wherein Inspectors and Sub Inspectors fulfilling the criteria are eligible. The direct entry of officers is regulated through an All India Competitive Examination called as CAPF (AC) and conducted by the UPSC. The direct officer grade entry is at the rank of Assistant Commandant (AC), which is a Group A service rank, same as that of direct recruits to Indian Foreign Service (IFS), Indian Revenue Service (IT) and Indian Revenue Service (C&E).
In the year 2014,Rahul Singla and in year 2016, Sagar Kumar both IIT BHU (Varanasi) graduates, secured rank one in CAPF examinations. 
In the year 2015, Burhan Hussain, a Kashmir resident, obtained All India Rank 1 in the CAPF (AC) 2015 examination and became the topper.
Nationality: No person who is not a citizen of India shall, except with the consent of the Central Govt. can give the written or be appointed.
Ranks Structure (Gazetted Officers)
|CAPFs Ranks||Police Ranks||Army Ranks||Navy Ranks||Air Force Ranks||Coast Guard Ranks.|
|Director General (Apex Scale of the Indian Police Service)||C.P, Director General of a State Police Force||Lieutenant General (Army Commander's Scale)||Vice Admiral (FOC-in-C's Scale)||Air Marshal (AOC-in-C's Scale)||Director General|
|Special Director General (HAG+ scale of Indian Police Service)||C.P, Special Director General||Lieutenant General(HAG+ Scale)||Vice Admiral(HAG+ Scale)||Air Marshal(HAG+ Scale)||Additional Director General (HAG+ Scale)|
|Additional Director General (HAG Scale of the IPS cadre, also available to BSF cadre)||C.P, ADG||Lieutenant General (HAG)||Vice Admiral(HAG)||Air Marshal(HAG)||Additional Director General (HAG Scale)|
|Inspector General||Joint C.P, IG||Major General||Rear Admiral||Air Vice Marshal||Inspector General|
|Deputy Inspector General||Additional C.P, DIG||Brigadier||Commodore||Air commodore||Deputy Inspector General|
|Commandant||DCP(Selection grade)/SSP||Colonel||Captain||Group Captain||commandant|
|2 I/C||DCP(Jr grade)/SP||Lt.Colonel||Commander||Wing Commander||commandant (Jr grade).|
|Deputy Commandant||Addl.DCP/Addl.SP||Major||Lt.Commander||Sqn Leader||Deputy Commandant|
|Assistant Commandant||Assistant Commissioner of Police/ Deputy Superintendent of Police||Captain||Lieutenant||Flight lieutenant||Assistant Commandant|
- "Central Police Forces (Assistant Commandants) Examination : (Overview)". Retrieved 3 January 2014.
- "CRPF Academy". Department of CRPF Academy, Kadarpur, Gurugram, Haryana, India. at present 48th batch of DAGOs is undergoing training in Academy. Retrieved 3 January 2014.
- "Gaur is first ADG of BSF from cadre". The Indian Express. New Delhi. 11 July 2009. Retrieved 3 January 2014.