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Kel-tec RFB rifle (USA)![]() Kel-tec 5,56mm SUB-16 prototype personal defense weapon of early 1990s, which served as a starting point for RFB image: Kel-tec
The RFB rifle is a very interesting development of the Kel-tec CNC
Industries company, USA. First displayed during ShotShow 2007 expo,
this weapon is now (spring 2007) in advanced development; mass
production scheduled to early 2008. The RFB is an acronym which stands
for Rifle, Forward ejection, Bullpup.
It is a brainchild of the George Kellgren, the chief designer
of the Kel-Tec. George Kellgren was long involved into development of
advanced bullpup rifles, starting with unorthodox Interdynamics MKR rifle
of late seventies. During following decades, Kellgren designed a number
of bullpup weapons, featuring first bottom and then forward extraction.
During early nineties Kellgren designed a compact bullpup 'personal
defense' weapon, designated SUB-16. This was a gas-operated
semi-automatic weapon, firing .223 Remington ammunition and featuring
forward ejection, with dual tilting extractors / ejectors used to move
fired cartridge up from the breech face and push it into ejection chute
above the barrel. SUB-16 was a promising and really novel design but
the infamous Assault Weapons Ban of 1994 effectively has killed it.
Nevertheless, the forward ejection concept was not forgotten, and in
around 2003 Kel-tec initiated development of an accurate,
semi-automatic rifle with long barrel and compact bullpup layout. In
2005, Kel-tec team began development of the SRT-8, the 7,62x51
semi-automatic sniper rifle. After much experimentation Kel-tec team
successfully solved most problems associated with forward ejection
system, and in November 2006 the SRT-8 project has changed its name to
RFB. Original model designations 'Sniper', 'Hunter' and 'Battle' were
also changed to less menacing 'Target', 'Sporter' and 'Carbine'
respectively. As of now (April 2007), Kel-tec is tooling up for first
pre-production batch of RFB. At the same time, Kel-tec is investigating
smaller- versions of the same design, adapted to 'intermediate'
calibers such as 7,62x39, 5,56x45 / .223, 6,5 Grendel or 6,8x43 Rem
SPC. This weapon will be significantly lighter and more compact,
retaining same ambidexterity and high barrel length to overall length
ratio of the RFB. Kel-tec RFB rifle is
gas-operated, using short-stroke gas piston located above the barrel.
Gas system is fitted with manual gas regulator, located at the front of
gas block. Bolt system is somewhat unusual, as the long bolt carrier
has an inverted U-shaped cross-section, and runs above the barrel and
ejection chute. The bolt is hinged to the rear of the carrier. Locking
is achieved by tipping the rear of the bolt down, to engage locking
recesses in barrel extension. Forward ejection system includes dual
extractors / ejectors, pivotally attached at either side of the bolt.
Upon final stage of the bolt opening movement, those extractors are
cammed up, to bring the fired cartridge above the barrel and in line
with ejection chute above it. Upon closing movement of the bolt, it
strips the fresh cartridge from magazine and feeds it into the chamber,
simultaneously pushing the fired case forward and into ejection chute.
Upon final closing movement of the bolt ejectors are cammed down to
release fired case and to grip on the base of the fresh cartridge in
the chamber. Fired cases then remain in the ejection chute until
manually shaken out of it or pushed out by subsequent cases. Special
provisions are made to avoid empty cases bounced back from chute and
into receiver. Bolt system features dual return spring installed on
captive spring guides. Upon disassembly, bolt group along with recoil
springs is removed from the gun as one unit. Charging handle is reciprocating and can be installed on either side of the gun. Special thanks to George Kellgren for invaluable information and images. --
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