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TKB-517
Type	Assault rifle
Place of origin	Soviet Union
Production history
Designer	German Korobov [ru]
Designed	c. 1952
Manufacturer	Tula Arms Plant
Variants	TKB-317 TKB-454 TKB-516 TKB-523
Specifications
Mass	3.18 kg (7.0 lb) (unloaded) 3.5 kg (7.7 lb)(loaded with 30-round magazine)
Length	910 mm (36 in)
Barrel length	415 mm (16.3 in)
Cartridge	7.62×39mm
Action	Lever-delayed blowback
Rate of fire	560 rounds/min
Muzzle velocity	720 m/s (2,400 ft/s)
Effective firing range	350–400 m (1,150–1,310 ft)
Maximum firing range	1,500 m (4,900 ft)
Feed system	30-round detachable box magazine Belt (TKB-516)
Sights	Adjustable iron sights

The TKB-517 (Russian: ТКБ-517) is an assault rifle designed by German Aleksandrovich Korobov. This rifle was externally similar to the AK-47, but based on the lever-delayed blowback mechanism invented by John Pedersen and refined by Pál Király. It turned out to be more reliable, more accurate and controllable under full auto, and easier to produce and maintain. Like the AK series, it was also manufactured with folding stocks, longer, heavier barrels with bipods (forming light support weapons) and even a belt-fed variant. Its rejection was because of a greater proficiency with the AK-47 among the Soviet military, though it is just as likely it was rejected due to relatively high extraction pressure, which is a common issue firearms using lever-delayed blowback actions.

Design and features

The TKB-517 is externally similar to the AK-47 and field-strips similarly, but instead it uses lever-delayed blowback for its operation, slightly reducing recoil and making it more controllable. The receiver is made from pressed steel with laminated wood stock, grip and handguards.

See also

• Dlugov assault rifle
• TKB-059
• TKB-408
• VAHAN
• List of assault rifles

References

1. Popenker, Maxim. "Korobov TKB-517". Modern Firearms. Retrieved April 4, 2007.
2. McCollum, Ian. "Play (k) 2:33 / 2:56 How Does It Work: Lever Delayed Blowback". Youtube. Forgotten Weapons. Archived from the original on 2021-12-14. Retrieved 17 April 2020.
3. F, Nathaniel (December 13, 2014). "Ten 20th Century Military Rifles History Has Forgotten". The Firearm Blog. Archived from the original on October 2, 2022.

• Russian Arms Workers: Ahead of time Archived 2011-08-12 at the Wayback Machine
• German Aleksandrovich Korobov
• Игорь Боечин, "Неизвестный Коробов", Оружие, 1998/5, pp. 2–10 (this gun on pp. 7–8)

v t e Delayed blowback firearms
Lever delayed	AA-52 Benelli B76 Cristóbal Carbine Danuvia 43M Dlugov FAMAS FN Five-seven FNAB-43 Garanin MAC-58 Sterling 7.62 ST Kinetics CPW TKB-517 AVB-7.62
Roller delayed	Calico M960 CEAM Modèle 1950 CETME Ameli CETME rifle CETME Model L Gerät 03 prototype HK G3 HK G41 HK MP5 HK P9 HK PSG1 HK MSG90 HK SR9 HK UCP HK21 HK33 HK43 HK SL6 HK SL7 MG 45 PTR 91F SIG 510 SIG MG 710 SRM Arms Model 1216 StG 45(M)
Gas delayed	Arsenal P-M02 Grossfuss Sturmgewehr Heckler & Koch P7 M-77B Steyr GB Volkssturmgewehr 1-5 Walther CCP
Hesitation locked	M50 Reising Remington Model 51 Remington Model 53 Remington R51 SIG MKMO
Flywheel delayed	Barnitzke machine gun MGD PM-9
Radial delayed	CMMG MkG
Toggle delayed	Schwarzlose machine gun T1E3 Model 32 semi-automatic rifle
Vector delayed	Jatimatic KRISS Vector

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