RBF (Reinforced Buffer
retainer, Forward Controls) is a strengthened AR buffer retainer
machined with Swiss machines from 17-4 stainless steel bar stock, and
heat treated to H900 hardness. RBF features a reinforced tip that is
10% larger (0.102) than TDP spec (0.093). We don't want RBF to be timed
(as the case with a rectangular tip), so RBF retains the TDP buffer
retainer's versatile round tip, and is installed per TM instructions.
10% is as much as we could increase before encountering receiver
extension timing incompatibilities.
the systems in an AR function properly, one could argue that a
reinforced buffer retainer isn't necessary. We agree, except mix and
match parts from different manufacturers and their varying adherence to
TDP specs, tolerance stacking is far from the exception. Many of us
have had this inexpensive part break and toss its tip into the lower
receiver, usually in the trigger group and cause a jam. RBF's billet
construction and reinforced tip aim to mitigate this, it could be viewed
as cheap insurance, even if the way we make it is anything but cheap.
is a stand alone product, it's available with optional buffer retainer
springs (x2). When it comes to springs, it is our practice to include
extras when they're under pressure during installation/removal, optional
buffer retainer springs inclusion is no different, two springs will be
included should you opt for them.
RBF is compatible with AR15/M16 milspect rifle and carbine receiver extensions, as well as Vltor A5 system receiver extensions.
* Always wear eye protection while handling springs under pressure, spring loaded pins and detents.
RBF isn't a fix for out of spec lowers with incorrectly positioned
buffer retainer hole. If you detect excessive wear marks on the
buffer's front face, it's advisable to warranty exchange your lower
* Compatible with PWS Enhanced carbine receiver extension.
Receiver extensions (REs) timing on the receiver can vary. While the
an RE can rotate past dead center (with the RE covering and retaining
the buffer retainer) by 45 degrees or more on one receiver, it might
only be able to do 15 degrees or less on another. Also, different REs
have different timing values.