Editing Degtyaryov machine gun (section)

=== Sound Suppressor ===
At the end of 1941, the SG-DP (Special Sound Suppressor for the “DP” LMG), likely developed with I.G. Mitin's involvement, was created. It used low-charge rounds with light bullets, reaching a muzzle velocity of 330 m/s. The suppressor enabled silent automatic fire up to 300 m (with a lethal range of up to 500 m). It was adopted by the [[Red Army]] on May 27, 1942. In June 1942, Plant No. 2 of the NKVD in [[Kovrov]] planned to produce 500 units<ref>{{cite web
 |last=Chumak
 |first=Ruslan
 |title=Ленинградские «Брамиты»
 |work=Журнал «Калашников»
 |issue=5
 |year=2015
 |pages=34–36
 |url=http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2015/kalashnikov_05_2015.php
 |archive-url=https://web.archive.org/web/20150925094331/http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2015/kalashnikov_05_2015.php
 |archive-date=2015-09-25
 |access-date=2015-09-12
 |language=ru
}}</ref>. The suppressor weighed 1.3 kg, and the overall length of the machine gun with it was 1332 mm<ref name="Kalashnikov 98">{{cite web
 |last=Chumak
 |first=Ruslan
 |title=Звук выстрела совершенно отсутствует…
 |work=Журнал «Калашников»
 |issue=8
 |year=2014
 |page=98
 |url=http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2014/kalashnikov_08_2014.php
 |archive-url=https://web.archive.org/web/20151118035742/http://kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2014/kalashnikov_08_2014.php
 |archive-date=2015-11-18
 |access-date=2015-09-13
 |language=ru
}}
</ref>.

After testing in July 1942, the SG-DP was revised at Kovrov's OKB-2 by designers A.M. Marantsev and I.V. Dolgushev. The improved suppressor had a reduced inner diameter from 16 to 14.5 mm. It weighed 1.15 kg, had an 85 mm muzzle attachment, and an overall length of 291 mm<ref name="Kalashnikov 98"/>.

[[File:SnowStepDPOrig.jpg|thumb|Snowshoe for the DP LMG]]
[[File:SnowstepDP27.jpg|thumb|DP-27 with replica snowshoe]]
In late 1942, the suppressor was tested at the [[Central Scientific Research Proving Ground for Small Arms and Mortars|NIPSVO]] as the SG-42 (Special Suppressor Model 1942). It was presumably used at the front and mass-produced, although production volume is unknown. Postwar tests in February–March 1948 found the suppressors unreliable, and they were decommissioned<ref>[http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2010/8_2010.php Журнал «Калашников» № 8/2010. Yuri Ponomaryov “Biography of PBS”, p. 30] {{webarchive|url=https://web.archive.org/web/20140812211921/http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2010/8_2010.php}}</ref><ref name="Kalashnikov 99">{{cite web
 |last=Chumak
 |first=Ruslan
 |title=Звук выстрела совершенно отсутствует…
 |work=Журнал «Калашников»
 |issue=8
 |year=2014
 |page=99
 |url=http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2014/kalashnikov_08_2014.php
 |archive-url=https://web.archive.org/web/20151118035742/http://kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2014/kalashnikov_08_2014.php
 |archive-date=2015-11-18
 |access-date=2015-09-13
 |language=ru
}}
</ref>.

Between 1948–1950, the suppressor was further developed into the KB-P-535 at OKB-2. It weighed 0.96 kg with obturators, measured 301 mm in length, 68 mm in height, and 34 mm in width. The DP with this suppressor measured 1310 mm<ref name="Kalashnikov 99"/>.

In March–April 1950, the KB-P-535 suppressors were tested with the [[RP-46]] machine gun but again failed to meet requirements<ref name="Kalashnikov 99"/><ref>[http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2010/9_2010.php Журнал «Калашников» № 9/2010. Yuri Ponomaryov “Biography of PBS. Continuation” p. 28] {{webarchive|url=https://web.archive.org/web/20150504172243/http://www.kalashnikov.ru/Kalasnikov/Arhiv_Kalashnikov/2010/9_2010.php}}</ref>.