User:G PViB/Template:sandbox

57mm to 100mm (aircraft-mounted)
http://commi.narod.ru/txt/shirad/149.htm http://www.plam.ru/tehnauka/genii_sovetskoi_artillerii_triumf_i_tragedija_v_grabina/p36.php

Aleksandr Konstantinov
A series of delayed blowback firearms chambered in 7.62×39mm.


 * 2B-P-25 - SAW, early 1950s and 1958 issues


 * 2B-A-3035 - assault rifle, 1955–56
 * 2B-P-30 - SAW, 1957


 * 2B-A-4045 - assault rifle, 1956
 * 2B-P-40 - SAW, improved 2B-P-25, 1956