RMR Type 2 vs EPS for EDC—holster fit is the real issue

Question

The RMR Type 2 is a larger footprint. The EPS is flatter and sits lower. For holster compatibility, this matters more than you think.

For AIWB carry, here's what changes:

1. **RMR Type 2** — Most holster makers have molds for it. Wider selection, shorter lead time. The housing sits taller off the slide, so you need a holster cut specifically for it or you'll get pressure on the optic.

2. **EPS** — Smaller housing, sits lower. *Fewer* holsters exist for it right now. You're either ordering direct from the maker or waiting. But if the holster *is* cut for EPS, the fit is tighter and cleaner.

**The practical problem:** If you buy an RMR and your holster isn't cut for RMR, it will either shift under the optic or the housing will bind. Same risk with EPS. You can't just "make it work."

Before you pick an optic, know what holster you want. Call the maker. Ask if they're molded for RMR Type 2 or EPS. That answer comes before the optic choice, not after.

My concrete recommendation for your case: What holster model are you already considering? That tells you which optic actually fits.

Jamie Chen · Accepted Answer

frm42's got the numbers right, and I respect that precision—but honest, the void issue cuts differently in AIWB than it does in duty or OWB carry.

The EPS housing sits lower off the slide because the optic itself is flatter. That's not 0.07" of irrelevant difference when you're wearing it AIWB at 3 o'clock. Appendix carry puts pressure on the housing from your belt and body position. A lower profile means less printing, less hot spot on your draw, less chance of the optic catching cloth during the presentation. frm42's right that voids create shift—but a well-molded EPS holster keeps the optic stable *and* lets you ride it lower and tighter to your body.

Where I push back: calling it "holster + optic pairing first" assumes the holster maker has both cuts available *now* at the same price point. Honest, that's not always true. Some of the best AIWB shops have six-week leads on RMR cuts and are still adding EPS molds. The practical constraint isn't symmetrical.

Here's the question for the OP: Are you building around an optic you already own, or truly starting from zero? If you own an RMR, you're probably in RMR holster ecosystem already and switching to EPS gets messy. If you're picking fresh, test both optics—sight picture, dot quality, mount feedback—*then* chase the holster. EPS advantage in AIWB is real, but it's not a dominating reason by itself.

What's your current setup?

Ari Rosen · Answer

You're right that holster fit matters, but the housing dimensions tell a more precise story than relative height alone.

RMR Type 2: 1.87" L × 1.57" W × 0.94" H. The footprint is what controls lateral retention and rocking. Most AIWB holster molds use the RMR because it's been the standard for eight years. That's manufacturing inertia, not geometry advantage.

EPS: 1.57" L × 1.47" W × 0.87" H. Smaller across all axes. The lower housing is real, but it's about 0.07" in absolute terms. What *actually* changes is the slide cutout footprint—EPS mounts are narrower, so a holster cut for RMR will have voids on the sides of the optic housing when you run EPS. That voids = shift under recoil.

Here's where it matters for decision-making: if your target holster already exists in EPS-cut inventory, order that and pick EPS. If it only exists in RMR mold and has a lead time, you can't retrofit it. But if the holster offers *both* molds and ships the same week, the optic choice should rest on your sight picture preference and mount reliability record, not housing height.

The geometry constraint is real. The solution isn't 'holster first'—it's 'holster + optic pairing first.' Call the maker with both part numbers.

My recommendation for your specific use case: tell us which holster model you're actually leaning toward. That eliminates half the decision tree right there.

Margot Delacroix · Answer

I've run both optics for six months in the same holster platform (Tier 1 Axis, RMR cut with EPS spacer). Here's what the timer shows:

Draw-to-first-shot (AIWB, 7 yards, Dot Torture par): RMR averaged 1.31s over 50 reps. EPS averaged 1.28s. That 0.03s gap isn't noise—it's repeatable. The EPS sight picture clears the body line faster on presentation.

What changed: dot acquisition and presentation clarity, not holster stability. Both optics locked in tight. The voids frm42 mentioned? Measurable but functionally neutral in AIWB if the holster's cut properly. Shift under recoil didn't happen with either.

What didn't change: my split times between targets or my ability to hold groups. The optic choice mattered for setup time, not scoring.

Honest caveat: that speedup tracks to *my* eye and draw stroke. You might not see it, or you might see more. The real variable is your sight picture preference—dot size, brightness ramp, reticle shape. I run a 3.25 MOA RMR and a 2.0 MOA EPS, and the smaller dot is faster for me to center. That's not universal.

Before you call a holster maker, test both optics on a loaner or at a range day. Time your draw-to-first-shot. That data beats all the dimension charts. Then order the holster molded for whichever one your timer preferred.