The First Polymer Framed Pistol: Heckler & Koch VP70
In 1970 Heckler & Koch introduced the futuristic looking VP70 (VP standing for Volkspistole/People’s Pistol). Building on the idea behind the Mauser’s 9x19mm blowback Volkspistole. Heckler & Koch designed the pistol to be simple and cost effective and utilised a revolutionary polymer frame - making the VP70 the first production polymer handgun.
The VP70 was designed by a team headed by Alex Seidel, Tilo Moller and Helmut Weldle. It was chambered in 9x19mm and fed from a double-stack, double-feed 18-round magazine. This was a marked increase on Heckler & Koch’s first commercial pistol, the HK4. Work began on the design in 1968 and the pistol was was introduced in 1970, predating the Austrian Glock 17 by 12 years. The pistol used a polymer frame and receiver which supports the barrel.
The weapon used a standard blowback action, while this is typically ill-advised with 9x19mm ammunition Heckler & Koch alleviated the potential problems of the blowback action by machining extra deep rifling which allowed propellant gases to bleed past the projectile as it moved up the barrel. This dropped the pressure in the barrel - though in turn reducing the round’s muzzle velocity by around 10%.
The VP70′s action was striker fired with a very heavy double action trigger. The VP70 doesn’t lock open on an empty magazine and has no manual slide lock. Unloaded the VP70 weighed 0.82kg/29oz, significantly heavier than the later Glock at 0.65kg/23oz. Unlike the Glock, the civilian VP70 had a conventional cross-bolt safety positioned behind the trigger. The magazine release is located on the heel of the magazine - common with European pistols.
Patent drawing showing the stock assembly for the VP70M (source)
The VP70 was designed with an impending Soviet invasion in mind, it was designed to be cheap and easy to manufacture. It was intended to arm the German people should they need to resist a Soviet invasion, though what good arming the population with handguns would do is unclear. It was reportedly intended for stay-behind guerilla elements inside territory occupied by advancing Russian forces. Its possible to see it in this role as a concealable weapon offering considerable controllable close range firepower when used with its stock. The military variant, the VP70M (Militar)’s attachable polymer stock/holster is perhaps the pistol’s most interesting feature. It allowed the weapon to become a select-fire personal defence weapon (PDW), with a controllable 3-round burst option. The selector switch is located on the left hand side of the stock. While ostensibly designed as a cheap and simple weapon for mass production the addition of the stock’s burst mode necessitated a somewhat complex trigger mechanism. From examination of the pistols its clear the final product was not intended as a throwaway.
The pistol was also entered into the US military’s Joint Services Small Arms Program Trials in the late 1970s but suffered ammunition-related cycling issues and was rejected. Though originally designed for military purposes a civilian variant, the semi-automatic VP70Z (’Zivil’/Civil) was marketed. A limited run of VP70Z pistols were also chambered in 9x21mm for the Italian market. An even smaller run of ‘ZH’ pistols were produced with the civilian gun being sold with the attachable holster, without the burst fire mechanism.
The VP70 combined elements of the past and present with features like its holster/stock harking back the the earliest German automatic pistols while its polymer construction was at the cutting edge of manufacturing techniques in 1970. Production ceased in 1989 but the VP line continues with the unrelated HK VP9.
Sources:
Images: 1 (VP70Z) 2 3 (VP70M with Stock) 4 5
Military Small Arms, I. Hogg & J. Weeks, (1985)
‘The H&K VP70 Machine Pistol’, Firearms News, L. Thompson, (source)
‘Self-loading pistol with a stock’, US Patent #3861273, 23/06/73, (source)
‘Self-loading pistol having forwardly extending breech slide’, US Patent #3696706, 10/10/72, (source)
‘Self-loading pistol with cocking trigger‘, US Patent #3678800, 25/07/72, (source)
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