Vidhwansak : Indian multi-caliber anti material rifle

Vidhwansak is an Indian multi-caliber anti-material rifle (AMR) or large-caliber sniper rifle manufactured by Ordnance Factory Tiruchirappalli under DRDO. It can be used in the anti-materiel role for destroying enemy bunkers, lightly armoured vehicles, radar systems, etc. It is also effective in long-range sniping role.
It is being sold at the cost of Rs 10 lakh (about $20,000) as of 2011.

Specifications
Weight     25 kg
Length     1.7 m
Barrel length     1.1 m
Caliber     14.5×114mm, 12.7×108mm, 20x82mm
Action     Manual Bolt Action, recoiling barrel
Muzzle velocity     1,080 m/s
Effective firing range     1,800 m
Maximum firing range     2,300 m
Feed system     3-round magazine
Sights     8X42 Power Telescopic sight with Parallax adjustment

DRDO developed Vidhwansak in November 2005. After trials, Production began in February 2007. The Border Security Force (BSF) ordered 100 Vidhwansaks for use in the border areas. These were supplied by October 2008. The rifle has also been offered to the Indian Army and the National Security Guards. However, the Indian Army chose not to bring the Vidhwansak into use as it did not meet the weight requirements.

Variants
Vidhwansak AMR is one of few firearms to support 3 calibers with quick interchangeability (without completely disassembling and reworking the weapon). The Vidhwansak can be easily converted between the three calibers - 12.7 mm, 14.5 mm and 20 mm, by replacing the barrel, bolt, magazine and scope, which takes about 1 minute in the field, without the need for any specialized tools.