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Pistol red dot footprint chart

A footprint is the screw-and-lug pattern on the underside of an optic. A slide either has that pattern cut in, or an adapter plate supplies it. 18 footprints, busiest first.

Footprint	Screws	Torque	Optics	Slides cut for it	Plates
Trijicon RMRHolosun C-series pattern; the de-facto standard for duty-size slides	#6-32	15 in-lb	18	11	46
Shield RMScRMSc / J-Point pattern; the slim-slide standard	M4 × 0.7 usually; some slides M3 or #6-32	10–15 in-lb, per the optic or plate maker	15	59	37
Docter / NoblexVortex Venom & Viper, Burris FastFire, Meopta, EOTech MRDS	M3 / #4-40 by model	15 in-lb	9	5	29
Holosun KModified RMSc; 407K / 507K / EPS / SCS Carry	M3, M4 or #6-32, by optic	15 in-lb	7	51	49
Leupold DeltaPoint ProDPP; Vortex Defender-ST / EOTech EFLX	M4 × 0.7	20 in-lb (confirm current Leupold spec)	7	17	32
Aimpoint ACROACRO P-1 / P-2 / C-2, Steiner MPS, Viridian RFX45	Cross-bolt clamp	per Aimpoint manual	6	1	26
SIG-LOCROMEO-X SIG-LOC line; M17/M18 and P365 SIG-LOC slides	Screws from beneath the slide	18 in-lb	2	2	0
C-More RTS2 / STS2C-More competition pattern	per C-More kit	per C-More manual	2	0	19
Trijicon RMRccRMRcc / ADE NUWAcc pattern	per plate maker (plates ship their own; not the RMR's #6-32)	18 in-lb	2	0	5
Holosun SCS (MOS)SCS MOS — mounts straight to a GLOCK MOS pocket	per SCS kit	per Holosun manual	1	16	0
SIG Romeo1ProP320 X-Series factory optic cut	M4 × 0.7	28–30 in-lb	1	12	4
SIG Romeo2Romeo2 enclosed pattern	M4 × 0.7	28 in-lb	1	10	2
Aimpoint COA / A-CutGLOCK A-Cut	2 rear screws + front tongue	per Aimpoint manual	1	7	1
Holosun SCS (320)SCS 320 — SIG P320 optic cut	per SCS kit	per Holosun manual	1	7	2
SIG-LOC PROROMEO-X SIG-LOC Pro on P320-pattern slides	Screws from beneath the slide	20 in-lb	1	1	0
Aimpoint MicroT-2 / H-2 and the Holosun 403/503/515 family	per mount	per mount maker	1	0	0
Holosun 509T509T proprietary	per Holosun kit	15 in-lb plate / 20 in-lb optic	1	0	17
Trijicon RCRRMR screw pattern, Trijicon capstan screws	Trijicon capstan screws	per Trijicon's torque card	1	0	11