Direct mount
EOTECH EFLX
Mounting footprint: DeltaPoint Pro · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 2; optic-manufacturer screws.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Build the mounting path.
Choose the exact factory optic-ready pistol. Known Ground separates direct fits from plate-required combinations and leaves uncertain fitment honestly unverified.
Step one
Select the exact pistol.
MOS, A-CUT, Gen6, DPO, and HOST are separate systems. Choose what is marked on or supplied with your pistol.
Selected system
Echelon 4.5
Springfield Echelon VIS · VIS
Variable Interface System with optic-specific pin and screw sets.
System checked Jul 15, 2026Manufacturer source ↗Step two
Browse the optic lineup.
Filter by manufacturer to see every cataloged optic, including combinations that still need verification.
Useful fits first
Direct mount
No separate adapter plate is required. Always confirm the specified screws and torque.
Direct mount
Holosun 507C X2
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 1; optic-manufacturer screws.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Holosun 508T X2
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 1; optic-manufacturer screws.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Holosun EPS
Mounting footprint: Holosun K / RMSc family · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 3; optic-manufacturer screws may require modification.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Leupold DeltaPoint Pro
Mounting footprint: DeltaPoint Pro · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 2; screw kit 2A.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
SIG Sauer ROMEO2
Mounting footprint: SIG PRO / DPP family — verify recoil bosses · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 2; optic-manufacturer screws.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Shield Sights RMSx
Mounting footprint: Shield RMS / RMSc · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 3; OEM screws.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Trijicon RMR HD
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 1; screw kit 1A.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Trijicon RMR Type 2
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 1; screw kit 1A.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Trijicon SRO
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 1; screw kit 1A.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Direct mount
Vortex Defender-ST
Mounting footprint: DeltaPoint Pro · checked Jul 16, 2026 · footprint source ↗
Direct VIS mount.
Hardware: Pin set 3; optic-manufacturer screws.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Plate required
These combinations require the exact plate or mounting kit shown with the optic.
Plate required
Aimpoint ACRO P-2
Mounting footprint: Aimpoint ACRO · checked Jul 16, 2026 · footprint source ↗
VIS ACRO plate required.
Hardware: Follow VIS ACRO plate instructions.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Required mounting path
OEM / factory
Springfield Armory Springfield VIS ACRO Plate
Manufacturer-listed mounting plate or kit.
Checked Jul 15, 2026 · Not personally tested
Plate required
Steiner MPS
Mounting footprint: Aimpoint ACRO · checked Jul 16, 2026 · footprint source ↗
VIS ACRO plate required.
Hardware: Follow VIS ACRO plate instructions.
Not personally tested · manufacturer verified · checked Jul 15, 2026
Required mounting path
OEM / factory
Springfield Armory Springfield VIS ACRO Plate
Manufacturer-listed mounting plate or kit.
Checked Jul 15, 2026 · Not personally tested
Incompatible and unverified optics 30
unverified
Aimpoint COA
Mounting footprint: Aimpoint A-CUT / COA · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 407C X2
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 407C X3
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 407COMP
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 407K X2
Mounting footprint: Holosun K · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 507-PROMAX
announcedMounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 507C X3
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 507COMP
Mounting footprint: Trijicon RMR · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 507K X2
Mounting footprint: Holosun K · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun 509T X2
Mounting footprint: Holosun 509T · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun AEMS-MACRO
announcedMounting footprint: Holosun 509T · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun AEMS-MICRO
announcedMounting footprint: AEMS-MICRO proprietary · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun DPS-TH
announcedMounting footprint: Holosun 509T · checked Jul 23, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun EPS CORE
announcedMounting footprint: Shield RMSc · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun EPS CORE MRS
announcedMounting footprint: Shield RMSc · checked Jul 23, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun EPS Carry
Mounting footprint: Holosun K · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun SCS 320
Mounting footprint: SIG P320 / DPP family · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun SCS Carry
Mounting footprint: Holosun K / RMSc adapter · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun SCS MOS
Mounting footprint: Glock MOS direct · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun SCS MP2
Mounting footprint: S&W M&P M2.0 direct · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun SCS PDP
Mounting footprint: Walther PDP 2.0 direct · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Holosun SCS VP9
Mounting footprint: HK VP9 OR direct · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
SIG Sauer ROMEO-X Enclosed Pro
Mounting footprint: DeltaPoint Pro · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
SIG Sauer ROMEO-X Pro
Mounting footprint: DeltaPoint Pro · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
SIG Sauer ROMEO1Pro
Mounting footprint: SIG PRO / DPP family · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Trijicon RCR
Mounting footprint: RMR-pattern / RCR hardware · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Vortex Defender-CCW
Mounting footprint: Shield RMSc · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Vortex Defender-CCW Enclosed Solar
Mounting footprint: Shield RMSc · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Vortex Defender-ST Enclosed Solar
Mounting footprint: DeltaPoint Pro · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
unverified
Vortex Defender-XL
Mounting footprint: DeltaPoint Pro · checked Jul 16, 2026 · footprint source ↗
No verified fitment evidence is on file for this combination.
Not personally tested · unverified · checked Not yet verified
Use this carefully
Compatibility is not a recommendation.
Model revisions, screw length, plate revisions, and supplied hardware can change. Confirm the exact manufacturer instructions before mounting or using equipment.