TKB-517

{{short description|Type of Assault rifle}}

{{Infobox weapon

| name = TKB-517

| image = KorobowTKB-517.svg

| image_size =

| caption =

| type = Assault rifle

| origin = Soviet Union

| is_ranged = yes

| service =

| used_by =

| wars =

| designer = {{ill|German Korobov|ru|Коробов, Герман Александрович}}

| design_date = {{Circa|1952}}

| manufacturer = Tula Arms Plant

| unit_cost =

| production_date =

| number =

| variants = TKB-317
TKB-454
TKB-516
TKB-523

| weight = {{cvt|3.18|kg|abbr=on}} (unloaded)
{{cvt|3.5|kg|abbr=on}}(loaded with 30-round magazine)

| length = {{convert|910|mm|abbr=on}}

| part_length = {{convert|415|mm|abbr=on}}

| width =

| height =

| cartridge = 7.62×39mm

| action = Lever-delayed blowback

| rate = 560 rounds/min

| velocity = {{cvt|720|m/s}}

| range = {{cvt|350|-|400|m}}

| max_range = {{cvt|1500|m}}

| feed = 30-round detachable box magazine
Belt (TKB-516)

| sights = Adjustable iron sights

}}

The TKB-517 ({{langx|ru|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.{{Cite web|url=http://modernfirearms.net/en/assault-rifles/russia-assault-rifles/korobov-tkb-517-eng/|title=Korobov TKB-517|website=Modern Firearms|first=Maxim|last=Popenker|access-date=April 4, 2007}} 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.{{cite web |last=McCollum |first=Ian |title=Play (k) 2:33 / 2:56 How Does It Work: Lever Delayed Blowback |url=https://www.youtube.com/watch?v=utv6LK6CxJI |archive-url=https://ghostarchive.org/varchive/youtube/20211214/utv6LK6CxJI |archive-date=2021-12-14 |url-status=live|website=Youtube |publisher=Forgotten Weapons |accessdate=17 April 2020}}{{cbignore}}