The AB-5.45, AB-7.62, AVB-7.62, and LCZ B20 are a series of weapons developed by Russian small arms designer Anatoly F. Baryshev from the 1960s to late 1990s. The mechanism developed by Baryshev allows the latter two of these light weapons to fire full powered rifle ammunition and still be controllable in automatic fire. Due to its firing from an open bolt, they were all unreliable under adverse conditions and inaccurate in single shots which tended to unsuccessfully slam-fire, otherwise the weapon would have apparently worked well. Another variant, the LCZ-B20 was developed in cooperation with Czech company LCZ Group, chambered in 7.62x51mm NATO, but sales were unsuccessful and it was apparently dropped in the late 1990s.
| AVB-7.62 | |
|---|---|
| Type | Battle rifle |
| Place of origin |  Russia Czech Republic |
| Production history | |
| Designer | Anatoly F. Baryshev |
| Manufacturer | LCZ |
| Produced | 1960s-1990s |
| Variants | See Variants |
| Specifications | |
| Weight | 3.6 kg (7.9 lb) (AB-7.62), 3.9 kg (8.6 lb) (AVB-7.62, LCZ B20) |
| Length | Stock open/folded 960 mm (37.8 in)/710 mm (28.0 in) (AB-7.62), 1,000 mm (39.4 in)/750 mm (29.5 in) (AVB-7.62, LCZ B20) |
| Barrel length | 415 mm (16.3 in) (AB-7.62), 455 mm (17.9 in) |
| | |
| Cartridge | 5.45x39mm (AB-5.45) 7.62x39mm (AB-7.62) 7.62x54mmR (AVB-7.62) 7.62x51mm NATO (LCZ B20) |
| Action | Lever-Delayed Blowback |
| Rate of fire | 750 rds/min |
| Feed system | 30 round (AB-5.45) 30 round (AB-7.62) 10 or 20 Round (AVB-7.62, LCZ B20) box magazine |
| Sights | Iron sights |
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