NOTE:
*
ABC/R is designed and made for TDP spec AR15/M16 in 5.56mm. Due to the
wildly varying configurations of PCCs it is not advisable to use ABC/R
on 9mm carbines. Do not use ABC/R on PCCs.
*
ABC/R is machined from a solid piece of 8620, tool marks are sometimes
inevitable, they are cosmetics in nature and have no impact on
functions. For anyone that cares more about how things look than how
they work, there are lesser built and less expensive bolt catches that
have no tool marks. We are not in the business of making decorations to
look at, or color matching. We design and produce components for
defense, LE, and MIL issued weapons.
ABC/R
(Augmented Bolt Catch/Release) with its angled and larger top paddle
and lower paddle with increased surface area, is purpose designed for
use with AR15/M16 receivers equipped with ambidextrous magazine
releases.
Specifically, it is designed to address the difficulty with accessing
the factory bolt catch's lower paddle with an ambidextrous magazine
catch, such as Norgon's Ambi-Catch, on the receiver. Many of the
ambidextrous mag release's lower paddle is on the same vertical plane as
the factory bolt catch lower paddle, making identification difficult by
feel, especially with a gloved hand.
The ABC/R's chief effort is focused on that single issue.
The lower paddle protrudes further, and is angled at 10 degree to give
it even more surface area. These measures put the lower paddle and
Ambi-Catch's paddle on different vertical planes.
That done, we worked on the top paddle. While we don't use it ourselves,
preferring to pull back on the charging handle instead to load and
reload, we do recognize far more users use it, so the ABC/R's top paddle
is made larger, and given a 5 degree angle at the lower 50%, and 10
degree angle at the upper 50% cant. The angled paddle makes it easier
for the palm or thumb to access.
The notch
immediately above the ABC/R’s lower paddle isn’t there by accident. As
you run your finger down the bolt catch towards the lower paddle, the
notch is meant to provide tactile feedback to indicate the beginning of
the lower paddle. It is important be able to differentiate one control
surface from another, all without diverting one's gaze to it.
For 2020 ABC/R version 3 consists of the following changes:
* Ledge on top of the upper paddle, and bottom of the lower paddle to increase traction.
* Upper paddle options: FB (forward biased), standard (centered upper paddle), RB (rearward biased).
* "Butterfly"
lower paddle with increased surface area, while maintaining a healthy
standoff distance from an ambidextrous magazine catch's lever.
* Slightly lengthened magazine follower trip. Do note that the longer magazine follower trip is designed to
make the bolt hold open after the last shot more reliable with more
magazine varieties, but not meant to be a fix for out of spec
receivers. We can lengthen it to a degree before running into
unintended consequences by making the trip too long.
ABC/R
v3 upper paddle options accommodate individual user's reloading
technique. Upper paddle options include FB (forward biased), standard
(centered, non-biased), and RB (rearward biased).
FB
(forward biased) is for right hand users that wrap their left hand
around the magazine well, and use their left thumb to press the bolt
catch's upper paddle. The FB version has the upper paddle shifted to
the muzzle end to facilitate this reloading method. Incompatibilities:
Standard
(non-biased) upper paddle remains the same position as v1 and v2 ABC/R,
its upper paddle isn't biased towards the front or rear.
RB
(rearward biased) is for left hand users that use their extended left
index finger to access the bolt catch paddles. The RB version has the
upper paddle shifted to the butt stock end to make the upper paddle more
accessible.
The
"butterfly" lower paddle's horizontal extension increases the lower
paddle's surface area, but stops short of reaching the bottom of the
bolt catch in order to create a stand off distance between the extension
and an ambidextrous magazine catch's lever. It is our opinion and
observation that close proximity of two control surfaces is best
avoided. The butterfly lower paddle has increased surface area, and
doesn't interfere with an ambi mag catch's lever.
Machined
from billet 8620 alloy steel and heat treated with DLC finish. The
ABC/R v3 is proudly designed and made in the USA. Starting from June 15,
2018, bolt catch roll pin, plunger and spring are included.
For more info on the dimpled
ABC/R-AA, please follow this
link.
Please note the ABC/R are not designed for use on 9mm receivers. Due
to the wide range of tolerances and designs that vary drastically from
5.56mm specs, we do not support ABC/R for use on 9mm PCC. ABC/R was
designed for use on 5.56mm AR15/M16.
ABC/R v3 with forward biased upper paddle may need minor fitting to work with BCM Mk2 upper receivers.
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