The Central Research Institute of Precision Machine Building (TsNIITOCHMASH) will transfer six samples of small arms, developed with the participation of Soviet and Russian engineer Pyotr Serdyukov, to the Central Museum of the Russian Armed Forces. The exhibits will take their place in the permanent exhibition.

Among the transferred samples are 9-mm self-loading pistols SR1M and SR1MP, 9-mm submachine gun SR2 and its modernized version SR.2M, 4.5-mm special underwater pistol SPP-1M, and 5.66-mm special underwater assault rifle APS.

The SR1M pistol is designed to engage targets at a range of up to 100 meters, including those in Level 2 body armor at a distance of up to 50 meters. Features of the model include two automatic safeties, push-button magazine release, automatic cartridge feeding when changing magazines, and the ability to operate with both the right and left hand. The SR1MP modification features a device for silent firing and Picatinny rails for mounting a collimator sight, tactical flashlight, and laser designator.

The SR2 submachine gun and its modernized version SR.2M are designed to engage living targets, including those in Level 2 personal protective equipment, and unarmored vehicles at a range of up to 200 meters. The modernization affected the folding stock locking mechanism – it became more reliable and allows for faster transition of the weapon from transport to combat position.

The underwater samples – the SPP-1M pistol and the APS assault rifle – are designed to engage targets underwater. The SPP-1M is capable of firing at a range of 10 to 17 meters depending on the depth. The APS assault rifle is necessary for engaging enemy combat swimmers and underwater vehicles.