5R is the form of rifling developed by Boots Obermeyer
for use in most target barrels and in many sporting barrels. These barrels have 5
grooves, and the lands have angular sides. It has been observed that bullet jackets
will deform such that they remain closer to the R-form lands than they will to the
sharp-edged lands present in conventional-style rifling. This reduces powder fouling
at the corner of the grooves. The angled form of the lands also helps to reduce
jacket failures in quick-twist barrels.
Multilog E2 Bolt
The E2 bolt design improves function and offers extended
lifespan. Dual ejectors provide significantly increased ejection force, ensuring
that the cartridge is cleanly ejected from the ejection port, even when using high
backpressure muzzle devices and collapsible stock systems, and provides a layer of
redundancy in the event of failure. The bolt lug design has been optimized and
stress-relieved, extending overall lifespan to not less than 10,000 rounds. The E2
bolt is completely backward compatible with M110 barrels and bolt carriers, and
utilizes many of the same parts as the legacy bolt design.
Knight’s Armament designed this system to give shooters
the maximum amount of options in their controls. Under this design all of the
weapon’s major controls can be accessed from either side of the lower receiver.
Left-handed shooters see the immediate benefits of being able to access the weapon’s
controls in a more intuitive manner; however, there are a number of other benefits
that right-handed shooters will enjoy under this system.
Competition shooters benefit from these controls from the increase of speed
that is achieved through components such as the right-side bolt catch. Trainers
enjoy the variety of options because they can watch their trainee from either side
of the weapon and even manipulate the weapon’s controls from the non-operating side.
KAC has also introduced modifications to the design such as the scalloped safety
selector switch. This allows a lower profile for the selector switch on the
non-operating side of the receiver which helps to relieve any interference between
the switch and a shooter’s glove or hand. For the maximum amount of configuration
and operation options, Knight’s Ambidextrous Controls offer a sure solution.
Stage Match Trigger
All of the weapons available from Knight’s Armament come
equipped with a 4.5lb, 2-Stage Match Trigger. This type of trigger mechanism uses a
system where, during the rearward squeeze of a trigger, it cycles through two stages
The first stage is a ‘no-poundage’ stage where hardly any resistance is felt
during the rear-ward squeeze. There is a center point at which point resistance is
felt and the second stage of the trigger begins. At this point, 4.5 pounds of force
is required to squeeze the trigger through the second stage and cause the weapon to
Our 2-stage trigger is meant to inform a shooter of exactly where their weapon is
going to fire. This bolsters a firer’s confidence and can also assist in reducing
trigger jerk, thereby increasing accuracy. The 4.5lb 2-Stage Trigger from Knight’s
Armament is a highly calibrated and smooth component that is sure to be a welcome
addition to any setup.
M-LOK is a modular locking accessory mounting system
that is a direct attachment method for hard mounting accessories to a negative space
mounting point. The M-LOK attachment system allows the user to put mounting rails
only where they were needed, as opposed to covering the entire surface with mounting
rails, which are then covered with panels. The system also allows direct mounting of
accessories, such as fore-grips and flashlights, with no rail interface needed.