The V-notch and apertures are calibrated for 5.56×45mm NATO ball ammunition. This ratio is continued until the locking rollers have been withdrawn from the barrel extension recesses. H&K designated this new weapon the HK53, it used the same telescopic stock as the HK33K and MP5 and a cut down 11 inch barrel, the HK53 also utilised a polymer forearm similar to the MP5s.

The "bolt head locking lever" is a spring-loaded claw mounted on the bolt carrier that grabs the bolt head as the bolt carrier group goes into battery. The Mexican armed forces manufactured the HK G3 of course, the MP5, and the Fusil Xiuhcoatl-05 and now its latest iteration draws much from the G36 used by Spain and various other nations. The rollers soon compress entirely into the bolt head, clearing the locking recesses of the barrel extension, and both parts now continue rearward together, opening the breech and actuating the extraction and feeding cycles. We specialize in all military surplus weapons from AK-47s, AR-15s, Mausers, CETME, Enfields, UZIs, and much more! The shoulder pad in rifles fitted with a telescopic stock was changed to a concave type used thus far in the MP5 series. Simple push-pins hold the components in place and removing them will allow the user to remove and replace parts rapidly. My dealer said that the earlier guns were marked HK33 but this one is an IC date code and my IB rifle is marked HK93 and has a semi auto carrier. My dealer said that the earlier guns were marked HK33 but this one is an IC date code and my IB rifle is marked HK93 and has a semi auto carrier. The HK13/HK23/HK33/HK53 series was offered to Harrington & Richardson in 1964. The trigger groups can be swapped out to meet the user's specific mission requirements. The rifle is disassembled into the following components for maintenance: the receiver/barrel, stock with return spring, bolt assembly and trigger pack in pistol grip. All parts listed in this category are specific to the HK HK33, HK53 & HK93 Rifles unless otherwise noted. It employs a two-piece bolt consisting of a bolt head with a pair of rollers and bolt carrier. The HK53A3 version features a retractable buttstock. The "safe" setting mechanically disables the trigger. Special forces units around the world including the British SAS, Royal Military Police Close Protection Unit and Royal Marines, designated the L101A1 in British service, who typically used it during close protection duties and operations involving close quarter battle. Although heavier than the M16, it was used in small numbers by SEAL teams due to its available 40-round magazine. In 1968 Heckler & Koch launched the HK33, chambered in 5.56x45mm, to compete with Colt’s AR-15/M16. "Fero Z24 4×24 telescopic sight for G3 rifle instruction manual", "HPG / PKK : the balance of war for the year 2012", Chile; Marines confirm SCAR 5.56mm rifles order, "Infantry Weapons of the Salvadoran Forces", "Kopassus & Kopaska - Specijalne Postrojbe Republike Indonezije", "Garda College Yearbook listing weapons training on page 66", "Equipement :: Unité Spéciale de la Police ::", "Peruvian Small Arms: Gunning for the Shining Path", "Rice Not Guns - German Arms in the Philippines", "MKEK - Makina ve Kimya Endüstrisi Kurumu", "Guns of the United States Border Patrol", HK33 operator's manual also containing the HK53 variant,, Weapons and ammunition introduced in 1968, Short description is different from Wikidata, Articles with unsourced statements from March 2019, Articles with unsourced statements from March 2014, Articles with unsourced statements from April 2020, Creative Commons Attribution-ShareAlike License, Rotary rear aperture drum, hooded foresight, This page was last edited on 8 October 2020, at 14:27.
Of course the various state police forces and the armed forces also buy all kinds of weapons from various sources too, so there is often quite a mix. Survivalist - Vintage G.I. New content will be added above the current area of focus upon selection The HK53 is essentially a cut-down HK33. ( Log Out /  The HK53 is essentially a cut-down HK33. The weapon weighed just over 3kg (7lb), almost a 1 kg less than its parent rifle the HK33. The rear sight is mechanically adjustable for both windage and elevation with the help of tools.

[2]. Please do not reproduce photographs taken by Matthew Moss without permission or credit. In the standard version, the rifle comes equipped with an ambidextrous trigger group with a selector lever that is simultaneously the weapon's safety (it has three positions: "S" or "0"—weapon is safe, "E"/"1"—semiautomatic fire, "F"/"25"—continuous fire). The barrel contains 6 right-hand grooves and terminates with a slotted flash suppressor that enables the use of rifle grenades and supports a standard G3-type bayonet that mounts above the barrel. Heckler & Koch developed the HK33 assault rifle from the 7.62 x 51 mm G3 rifle. Chambered in 5.56mm x 45mm NATO, the HK53 packs a substantially heavier punch than the 9mm MP5 without being much bigger.

Based on the geometric relationship arising from the angles of the roller contact surfaces of the locking piece and the barrel extension recesses, the recoil of the bolt head is delayed by a ratio of 3:1 for the 5.56×45mm NATO chambering. The Royal Military Police Close Protection Unit’s L101A1’s were also fitted with a new two stage buffer within a fixed stock. Length (with stock extended): 76.5cm (30in) 700 rpm, The World’s Assault Rifles, G.P.

Further like the G3 the HK33 also contains a spring extractor and a buffer. We set ourselves apart by supplying unique parts at a good value and standing by our products by offering outstanding customer service. The weapon weighed just over 3kg (7lb), almost a 1 kg less than its parent rifle the HK33. The World's Assault Rifles by Johnson and Nelson, Page 217. ( Log Out /  The spring-powered claw extractor is also contained inside the bolt while the lever ejector is located inside the trigger housing (actuated by the recoiling bolt). This site uses cookies. getting in and out of vehicles or inside buildings.
The rifle was also licence-built in Turkey by MKEK, and exported from France branded as MAS but actually made in Germany.

The chamber is opened under high pressure, thus the chamber received a series of flutes in order to increase extraction reliability and prevent sticking of the spent casing to the chamber walls. During its production life the rifle has received several minor improvements (these modified weapons are sometimes referred to collectively as the HK33E). Due to the modularity of the HK33′s design users could replace the butt of the standard rifle with a collapsible telescopic metal stock.

[13] Some of these rifles were seized by groups such as the Patani United Liberation Organisation[14] or the Gerakan Mujahidin Islam Patani. The firearm is equipped with a relatively low iron sight line that consists of a Drehvisier a rotary rear drum and hooded front post. Several police forces and militaries adopted the HK53. Change ), You are commenting using your Google account. The HK33 and its magazines lack the T223's hold-open system. The HK53A3 version features a retractable buttstock. Image by Sean Clee | © UK MOD / Crown Copyright 2003, SAS Survival Secrets - Guardians Against Terror BBC [DVD]. The HK33 is a selective fire weapon with Heckler & Koch's roller-delayed blowback system of operation. Upon firing, the two cylindrical rollers in the bolt head are cammed inward by inclined surfaces of the barrel extension and impart a rearward motion on the locking piece, which also propels the bolt carrier rearward. Turkish MKEK-made rifles are issued with 30-round polymer magazines. Included with the rifle are a detachable bipod, bayonet (from the G3), sling, cleaning kit and a magazine loader. The SAS used the HK53 in Northern Ireland.

The HK33 series of rifles were adopted by the Brazilian Air Force (Força Aérea Brasileira or FAB), the armed forces of Thailand and Malaysia where they were produced under a licence agreement. Heckler & Koch would submit their designs through Harrington & Richardson and their contacts rather than set up an American branch. The basic operating systems of the HK33 are the same as those of the G3. The barrel chamber is fluted, which assists in the initial extraction of a spent cartridge casing (since the breech is opened under very high internal cartridge case pressure). The result was essentially an intermediate calibre submachine gun similar to the Colt Commando and the Soviet AKS-74U. Some Army Air Corps helicopter pilots carried a HK53 as their personal weapon while flying sorties in Northern Ireland. Following a meeting between the Army Technical Support Agency’s Directorate of Engineering and H&K a new design for the locking pieces were developed. Nelson, (2010), Heckler & Koch HK33 & HK53 manual (source), HK53 factory colour brochure, 1987, (via Small Arms Review Reference Library), Itemised list of L101A1’s which suffered damaged locking rollers, MoD Equipment Failure Report, 15 Nov. 1994, (via Small Arms Review Reference Library), Army Technical Support Agency report on receiver damage to HK53 and G3 rifles, 1996,(via Small Arms Review Reference Library). The improved curved magazines were available from 1966.

Building on the success of their G3 design, the company developed a family of small arms (all using the G3 operating principle and basic design concept) consisting of four types of firearms: the first type, chambered in 7.62×51mm NATO; the second, using the Soviet 7.62×39mm M43 round; the third, chambered in the intermediate .223 Remington and 5.56×45mm NATO; and the fourth type, chambered for the 9×19mm Parabellum pistol cartridge.

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