While doing research for another article, I came across an invention of a Kazakh arms designer named Diyar Gilmanov. This gentleman has designed a muzzle device which has quite an interesting construction.
Gilmanov’s muzzle brake has a telescoping design. It consists of an inner part that is mounted onto the muzzle of the weapon and a spring-loaded mobile part. Upon firing the weapon, gasses escaping the muzzle enter the two expansion chambers (4 and 5 in the drawings) and force the spring loaded part to move forward. The spring then extends and returns the mobile assembly back to its collapsed position.
According to the designer, this forward motion mitigates the recoil. It is probably accomplished by the mass of the forward moving assembly which counters the rearward motion of the bolt carrier group or the recoil mitigation occurs due to the forward impact of the mobile part onto the housing on its foremost position. The recoil reduction may also be achieved by the combination of the described two processes.
The drawings used in this article are from the Kazakh patent #16012 granted to Diyar Gilmanov in 2009. You can view or download that patent (in Russian) by clicking here. Here is also a link to a short video (found on OK.ru social media website) showing this muzzle brake in action.
https://ok.ru/video/1155074560
Judging by the construction of this muzzle device, I assume it may also partially reduce the flash signature and the report. Also, it should double as a booster for AK carbines and AKS-74U (Krinkov) rifles.
相当精彩的博客，羡慕哦!