The Arms Act, 1959
6. Licence for the shortening of guns or conversion of imitation firearms into firearms –
No person shall shorten the barrel of a firearm or convert an imitation firearm into a firearm unless he holds in this behalf a licence issued in accordance with the provisions of this Act and the rules made there under.
Explanation – In this section, the expression ‘imitation firearms” means anything which has the appearance of being a firearm, whether it is capable of discharging any shot, bullet or other missile or not.