Forensic Ballistics: Country-Made Firearms (Kattas and Tamanchas)

UGC-NET Forensic Science Unit V drill on country-made firearms (kattas and tamanchas) at the foundations level. Covers the anatomy of the single-shot desi katta (smoothbore barrel from steel pipe, oversize chamber, leaf-spring trigger, hand-filed nail or wire firing pin, hardwood butt), the improvised tamancha pattern (crude lockwork, single-action lock, common .315 sporting and 12-bore conversions), the pipe gun and zip gun (single-tube two-piece sleeve construction, no proper headspace, recurrent in Bihar and Bengal seizures), the historical trafficking corridors that have supplied these weapons across northern and central India (Munger in Bihar, Khargone and Burhanpur in Madhya Pradesh, Khurja in Uttar Pradesh), the laboratory identification of improvised versus factory weapons (absence of proof marks and headstamps, file marks on the barrel exterior, tape and wire repairs, irregular chamber dimensions), and the statutory framework that governs these seizures (Arms Act 1959 Section 25 with the mandatory minimum, Section 27 for use with intent to cause death, the BNS 2023 firearm offences applicable when an improvised weapon is used in an IED or assault context).

Targeted at MSc and BSc Forensic Science students preparing for UGC-NET Paper II, NFSU MSc Forensic Ballistics entrance, and FACT applicants, the mock is also a quick refresher for working investigators who routinely receive country-made firearm exhibits.

Topics covered:

• Desi katta anatomy (smoothbore pipe barrel, oversize chamber, leaf spring, firing pin)
• Tamancha lockwork (single action, .315 and 12-bore conversions, crude trigger)
• Pipe gun and zip gun construction (two-piece sleeve, no headspace control)
• Munger, Khargone, Khurja, Burhanpur trafficking corridors
• Identifying improvised firearms (no proof mark, no headstamp, file and tape marks)
• Arms Act 1959 Section 25 mandatory minimum and Section 27 punishment
• BNS 2023 firearm-relevant offences in IED and assault contexts
• Stale-law dual citation (BNS 2023 alongside IPC 1860 sections)

Use this paper to lock down the country-made firearm vocabulary before moving on to comparison microscopy and proof testing. Allow 30 minutes.