PF-040 (Pins, Forward Controls, 0.040) is a set of elegantly simple, and
superbly crafted AR15/M16 pivot and take down pins. Machined from 17-4
PH SS bar stock and QPQ finished, these pins are 0.040 longer than TDP
spec pivot and take down pins.
PF-040 pins can be aptly described
as "reverse extended", in that they're longer on the left side of the
receiver, the additional length of the take down pin doesn't interfere
with ambidextrous safety operation. When PF-040 pins are pushed in from
the left side, the +0.040 transforms to extra length and grasping area
on the right side pin head, which combined with their silky smoothness,
makes pulling the pin a cinch.
PF-040 has the same elegant and
unadorned pin heads design that is in line with our design philosophy
which prioritizes functionality over aesthetics. PF-040 right side pin
heads (when installed on a receiver, with the muzzle pointing away) are
flat, with a small 45 degree chamfer. Serrations or dimples on the
right pin head would be useless, so they're completely plain. There is a
small dimple on the other side of the pin head, the tip of bullets (up
to 9mm) can be used to push the pins in on tight fitting receivers.
can be purchased with the optional takedown/pivot detents (4) and
springs (3) kit. The odd numbers of included components probably
deserve some explanation. Even for experienced AR builders, it's not
uncommon to launch the pivot pin detent into the twilight zone. It's
also fairly easy to bend the take down pin detent spring during
installation of the end plate and castle nut. So the optional detents
and spring kit includes 4 detents and 3 springs to preempt losses and
damages. If you don't end up needing and using all of them at once, the
kit is reasonably priced, and always good to have on hand to grow into
another AR :)
PF-040 pin diameter adheres to TDP dimensions and tolerances, 0.2485 +0.000/-0.005.
Made in USA.
PF-040 may not work "PDW" stocks that have bars overlapping the take down pin holes.