Custom SR-2 with AR Stock
The 2 in SR-2 stands for 2 stocks (look really closely at the top of the receiver)
A visual guide to differentiating Russian made 5.45 AR style rifles
Trinity Arms T&T 545
-Rock and Lock mag
-AK style reciprocating charging handle
STM-545
-AR Magwell that accepts either modified AK-74/12 mags or proprietary purpose made mags
-AR Charging handle

Suppressed example where you can just barely see the proprietary mag
Custom Guns NL545
-Rock and lock magwell
-AR charging handle
It may be hard to make out for the unfamiliar but the wet and muddy specimen featured in this photo is holding a pretty uncommonly seen A545 Balanced Action assault rifle
VSS/AS (Not VSSM or ASM) with AR stock
Ammo goes up
1P63 chopped and modified to flattery to pic rail
Urutau 9mm bullpup, "Not a Glock" .22lr pistol and Harlot .22 derringer produced by the Dutch National Forensics Institute for testing and research purposes.
Found this guy on YouTube who makes bodykits for guns and some other cool stuff
Homemade helical mag retained with strap
Made his own reproduction Sedgley glove gun
Made a modernized Cobray Terminator
Made a groza
AND Converted an STG-44 to 5.56
Haven't even poster all the body kits thisbguy made (AR mocked up as WA2000, AR Mocked up as M60 etc etc) this guy's channel is a treasure