Page 13 - Сигурност и отбрана - брой 2 - 2023

Security & Defense, Issue 2, 2023 Scientific journal

calculated with the use of following formula (Manual on live fire training.
2
Basics of shooting with small arms., 1985) :

2
2
2
| + + ⋯ + |
= 0,67 √ 1 2 (2)
− 1

where:
0,67 – value based on the correlation between σ and Root Mean Square
σ – mean deviation in mm
c – deviation value from a given dispersion axis in mm
n – number of measured values

In processing the results, the methodology allows the exclusion of hits
that do not fit within a circle with a diameter specified by the weapon
platform manufacturer. For the purposes of this publication, when
determining the CPI, the analytical method was adopted as the most accurate.
In its application, the coordinates of each of the perforations along the
abscissa and ordinate axes constructed on the target are taken. Their average
values determine the location of the CPI.
The analysis of results is based on the mean of the experimental data
obtained from the number of firings conducted and the number of
perforations generated.

2. COLLECTION OF EMPIRICAL DATA
The choice of weapon configuration for conducting the experiment was
based on the worldwide confidence in the qualities and characteristics of the
Heckler & Koch MP5 submachine gun. It has a decade-long history with the
specialized formations of almost all countries occupying leading positions in
the area of security. The following weapon configuration was used in the
present experiment:
- Heckler & Koch MP5 K submachine gun with barrel length of 115
mm (Heckler & Koch, 2005) and distance between the front and rear sights
of 260 mm
- 208 mm SD MP5 contactless suppressor made by Brügger & Thomet
- 9х19 Luger/Parabellum Arsenal ammunition with bullet weight of
7,45 gr (ARSENAL JSCo. (n.d.), 2023)
Achieving the objective of the study is essentially done by applying the
above-described methodology adjusted to the characteristics of the chosen
weapon platform.

2 Наставление по стрелково дело. Основи на стрелбата със стрелково оръжие. (1985). Военно
издателство, 68. // Nastavlenie po strelkovo delo. Osnovi na strelbata sas strelkovo orazhie. (1985).
Voenno izdatelstvo, 68.
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