The shoulder pad in rifles fitted with a telescopic stock was changed to a concave type used thus far in the MP5 series. The short barrel does, however, result in a reduced muzzle velocity and therefore a shorter effective range when compared with the HK33.
The HK53a3 makes for a good weapon for CP duty.
However, few major contracts were forthcoming with the German military opting to continue using the 7.62x51mm G3. The trigger groups can be swapped out to meet the user's specific mission requirements. Heckler & Koch would submit their designs through Harrington & Richardson and their contacts rather than set up an American branch. This issue arose when using a number of different ammunition types including brass cased blank ammunition (H&K recommend the use of their proprietary blank cartridges).
 Some of these rifles were seized by groups such as the Patani United Liberation Organisation or the Gerakan Mujahidin Islam Patani. 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. A number of police forces and militaries adopted the HK53 for a variety of roles. It's believed that the Regiment uses/has used the HK33KA3 carbine variant for close protection (body guarding) duties, usually keeping the rifle in the vehicles.
( Log Out / The only HK53s I’ve ever seen “in the wild” were in Mexico being used by one or another police agency. The Royal Military Police Close Protection Unit’s L101A1’s were also fitted with a new two stage buffer within a fixed stock. The HK53 is essentially a cut-down HK33. . The weapon weighed 6.6 pounds, around two pounds less than its parent rifle the HK33. The HK53 was also used by 14 Int (or 'Det') operators during The Troubles. "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, https://en.wikipedia.org/w/index.php?title=Heckler_%26_Koch_HK33&oldid=982496551, 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. Please scroll down for a complete list of all parts available.
It has better stopping power than a 9mm sub machine gun but is small enough to be wielded in tight spaces e.g. 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. 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. The weapon weighed just over 3kg (7lb), almost a 1 kg less than its parent rifle the HK33. Included with the rifle are a detachable bipod, bayonet (from the G3), sling, cleaning kit and a magazine loader.
The World's Assault Rifles by Johnson and Nelson, Page 217. New content will be added above the current area of focus upon selection This deliberately prevents non-armorers to (re)zero the iron sight line. Weight (collapsible stock, unloaded): 3.35kg (7.4lb) Chambered in 5.56mm x 45mm NATO, the HK53 packs a substantially heavier punch than the 9mm MP5 without being much bigger. The rifle is fed from 20- or 25-round steel magazines weighing 250 g or 40-round aluminum magazines (weighing 157 g). This required changing geometrical transmission ratio relationships between parts. Like the HK33, the HK53 fed from 25, 30 or 40 round box magazines. The rifle was also licence-built in Turkey by MKEK, and exported from France branded as MAS but actually made in Germany.
Like the HK33, the HK53 fed from 25-, 30- or 40-round box magazines. The SAS used the HK53 in Northern Ireland. The improved curved magazines were available from 1966.
Due to its short length the HK53 also found itself pressed into the port-firing weapon role. 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). ( Log Out / 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. Heckler & Koch entered into an agreement with Harrington & Richardson in 1963 to be their American partner. Image by Sean Clee | © UK MOD / Crown Copyright 2003, SAS Survival Secrets - Guardians Against Terror BBC [DVD]. It features an 8.3 inch barrel, and a MP5-style forearm. This ratio is continued until the locking rollers have been withdrawn from the barrel extension recesses. The HK33 is a 5.56mm assault rifle developed in the 1960s by West German armament manufacturer Heckler & Koch GmbH (H&K), primarily for export. The HK53A3 version features a retractable buttstock. The HK33 is a modular weapon system. - TACTICAL LIFE GEAR, Heckler & Koch HK33 – The Armourers Bench. The Heckler & Koch HK33 was developed following the success of the 7.62x59mm G3. This built-in mechanical disadvantage delays the movement of the bolt head relative to the bolt head carrier which is withdrawing at significant higher velocity of the bolt head.  The HK33KA3 features a retractable stock and a shorter barrel than the full-sized version. Change ), You are commenting using your Google account.  Thai government units fielded HK33s during the South Thailand insurgency. H&K offers several different trigger assemblies: a three-shot burst fire control group with selector lever/safety (selector settings: "0" weapon is safe, "1" single fire, "2" 2-round burst or "3" 3-round burst; the selector lever is ambidextrous); a "Navy" trigger unit (three settings: safe, semi and full auto fire) and a four-position trigger group (selector settings: safe, single fire, 3-round burst and automatic fire). 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. HK53s were also employed by the various close protection (bodyguard) units within the British military, including Close Protection Unit Royal Military Police and Royal Marines Police Troop, and was eventually replaced by the C8 CQB carbine. That's right, hasn't been milled. With the right clothing, the HK53A3 could be carried as a concealed weapon. Designated the HK53 MICV in this role the foregrip and stock was removed and a specially designed endcap and a spent case bag could be attachment.