SIL · 01IN STOCK
Versatility and power for 7.62 platforms.
SIL · 02 F556 · PRODUCT SHEETSHT 01 / 05 · REV A
F556
Enhanced Pressure Control for 5.56 Platforms
CONFIGURATION MATRIX · SELECT
MODELMOUNTMATERIAL
◦ Designations as published by Blackbird R&D
SYNCING PRICE…NFA ITEM · PROCESSED BY CAPITOL ARMORY
The Blackbird F556 is purpose-built for modern 5.56 rifle systems. Its patent-pending Staged Pressure Vectoring architecture manages pressure at the source, regulating internal gas release, directing blast forward, and minimizing gas to the shooter while maintaining low back-pressure performance.
Designed to improve system reliability and shooter comfort, the F556 delivers consistent suppression across a variety of centerfire platforms. The compact form factor reduces overall footprint without sacrificing control, making it well-suited for both duty use and extended firing schedules.
Manufactured using HAYNES® 282 and Titanium Ti-6Al-4V, the F556 offers configurations optimized for durability or lightweight performance. While tuned specifically for 5.56, it also performs exceptionally on 6mm ARC, providing balanced suppression and stable gas behavior across platforms.
Caliber5.56 (OPTIMIZED)
LengthHUB / 5.42” (5.87*) | QD / 5.75”
Diameter1.6"
WeightHUB HAYNES / 15.1OZ (17.6*) | QD HAYNES / 15.9OZ
HUB TITANIUM / 7.8OZ (9.3*) | QD TITANIUM / 8.3OZ
HUB TITANIUM / 7.8OZ (9.3*) | QD TITANIUM / 8.3OZ
MaterialsHAYNES ALLOY / TITANIUM
MountAVAILABLE IN HUB TAPER AND 1X16L ACME TAPER
ArchitectureSTAGED PRESSURE VECTORING™ · PATENT PENDING
QQD mount · HAYNES 282
QTQD mount · Titanium
HHUB mount · HAYNES 282
HTHUB mount · Titanium
02 SYSTEM BEHAVIORSHT 02 / 05 · REV A
Pressure managed at the source.
Staged Pressure Vectoring™ regulates the timing, direction, and rate of pressure release, blast energy is driven forward while rearward gas migration into the weapon system is minimized.
- Reduced receiver-side gas
- Lower back-pressure
- Maintained cyclic stability
- Repeatable performance, shot after shot
03 COMPATIBILITY & MOUNTINGSHT 03 / 05 · REV A
Two mounting standards. One system.
Every F556 configuration mounts on one of two published standards, chosen at order, matched at the muzzle.
HUB TAPERDIRECT THREAD ADAPTER · “HUB” 1.375-28
QDDECOUPLR MUZZLE DEVICE · 1×16L ACME
IN THE BOX
- DECOUPLR muzzle deviceWITH QD CONFIGURATIONS
- Direct thread adapterWITH HUB CONFIGURATIONS
The mounting ecosystem.
Engineered as active performance components, not passive attachments.
04 RELATED SYSTEMSCROSS-REFERENCE
05 ACQUISITIONSHT 05 / 05 · REV A
Own the F556. Delivered to your door after ATF approval.
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