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Unitary Test of portable firearms and certification - Law nr. 186 of 23 February 1960. Amendments to the Royal Legislative Decree Nr. 3152 of 30 December 1923 on the obligation of proof marks on portable firearms.

- Presidential Decree Nr. 1512 of 28 October 1964, approval of the Regulations for enforcement of Law Nr. 3152 of 30 December 1923 regarding the obligation proof marks on portable firearms.

- Law Nr. 953 of 12 December 1973
Ratification and enforcement of the Convention for the mutual recognition of proof marks on Portable Firearms with Regulations and Annexes I and II adopted in Brussels on 1 July 1969.
Kepping of identifying marks filed by firearms manufacturers
Inspection and certification of compliance with the National Catalogue of Commons Firearms submitted to the National Proof House - Law Nr. 110 of 18 April 1975. Supplementary regulations of the current legislation on the tests on weapons, ammunitions, and explosives (art. 11 paragraph 2, Article 14)

- Law Nr. 146 of 16 March 2006. Ratification and enhancement of the Convention and Protocols of the United Nations against transnational organized crime, adopted by the General Assembly on 15 November 2000 and 31 May 2001 (art. 15 paragraph 2)
Alienation of imported weapons found unfit and abandoned by the importer
Check, control, and affixing of the initials of the importing country and year of importation on weapons imported into Italy from non- EU countries
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Certification of accuracy gauges used for checks, by means of 3D optical measuring machine Mechanical testing of materials by microdurometer
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 The activities of measurement and certification of the Proof House can be divided into three groups:
- testing of firearms
- testing of commercial ammunition
- special ballistic tests (internal, external, and terminal ballistics).



For testing firearms, the Proof House has checking systems, equipment and instruments such as:
a) "go-no-go" testers;
b) electronic instruments for measuring the inside diameter of the barrel;
c) electronic scales;
d) shooting booths with pneumatic servo mechanisms allowing to test all types of weapons and barrels, in conditions of maximum safety;
e) IT system for real-time management, registration and filing of the data acquired in the testing process of each single firearm. The system can detect any recurrence of a weapon with a serial number already used by the manufacturer (for weapons made after 1999).

The checking and testing procedure to which every single firearm must be subjected (the tests are individual) is performed in compliance with C.I.P. Regulations, and consists of:
a) Checking the distinguishing marks which allow the identification of the weapon (trademark, serial number, catalogue number for rifled and caliber firearms).
b) Checking the compliance with the National Catalogue (Law Nr. 110 / 775): the firearms must find correspondence in the National Catalogue, and the supervisor must make sure their characteristics match those given on the related form published in the Official Gazette.
c) Visual and blank operational test.
d) Dimensional control of the characteristics that affect user’s safety.
e) test firing of two cartridges for each barrel, developing a pressure at least 25% above the maximum pressure of commercial cartridges. For the firearms tested for the use of steel shot cartridges, three shots per barrel are fired. For revolvers, one cartridge per chamber is fired.
f) Check after the shot: after firing, the weapons are carefully examined by a visual inspection and "no go" testers.
g) Proof marking and registration of data: if a weapon has passed all previous tests, the Proof House shall apply the proof marks in compliance with the C.I.P. Regulations

The data also are indicated on the test certificate; the Proof House issues a copy of the certificate to the submitter, and keeps a copy for itself.
The Proof House archive and database contain data for approximately 40 million firearms tested from 1920 to present.

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