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I’ve built both. My PF940C lives in a holster. My PF940V2 lives in a drawer next to the bed. Neither one was a mistake, and if you asked me to give one up, I’d genuinely struggle to pick.
But most people starting their first Polymer80 build aren’t looking for that non-answer. They want to know which frame makes sense for them — right now, for their specific situation. So here’s a straight comparison across the areas that actually matter, and a clear recommendation at the end for each type of buyer.
Table of Contents
Frame Size and Ergonomics: Where You Feel the Difference First
Pick up a PF940C and a PF940V2 back to back and the difference is immediately obvious — but maybe not as dramatic as you’d expect. The compact is noticeably shorter in the grip. You get four fingers on it comfortably, with your pinky either resting under the mag baseplate or floating depending on your hand size. The full-size gives you a complete five-finger grip, which translates directly into better leverage and more frame contact during recoil.
Both carry the same ergonomic upgrades over a standard Glock: the steeper grip angle that feels more natural in most hands, the extended beavertail that seats your grip higher for better recoil management, and the aggressive texture that doesn’t need grip tape as an afterthought. These improvements aren’t frame-specific — you get them on both models. That’s one of the things that makes Polymer80 frames worth building over just buying a stock Glock.
Where the full-size genuinely wins is shootability. More grip equals more control, a longer barrel means a longer sight radius, and at distance that adds up to tighter groups and a more forgiving platform. If you’re primarily building for range time or precision shooting, the V2 is the better tool.
Where the compact wins is everything that happens outside the range. It disappears under a shirt in a way the full-size simply can’t. That one fact makes the PF940C the choice for most carry-oriented builds.
Both frames share the same core ergonomic DNA. The comparison isn’t about comfort — it’s about what you plan to do with the pistol day to day.
Parts Compatibility: Both Are Loaded With Options
Good news on both sides: the Gen 3 Glock-compatible aftermarket is enormous, and both frames tap into it fully.
The PF940C is built around G19/G23 dimensions. The G19 is arguably the most popular pistol platform ever made, which means slides, barrels, trigger assemblies, parts kits, and sights are abundantly available, well-documented, and competitively priced. You will never struggle to find parts for a compact build.
The PF940V2 is built around G17/G22 dimensions. The G17 is the original Glock and has one of the deepest aftermarket ecosystems in the industry — full-size slides with optics cuts, match-grade barrels, competition trigger kits. Everything exists, and at every price point.
Magazine compatibility is worth noting: the PF940C accepts G19-pattern magazines (15 rounds standard), and the PF940V2 accepts G17-pattern magazines (17 rounds standard). Both accept higher-capacity aftermarket options. Neither frame has any meaningful disadvantage here — you’re well covered regardless of which you choose.
Carry vs. Home Defense: This Is Where the Decision Gets Simple
If concealed carry is the primary use case, build the PF940C. End of debate. The compact frame is shorter, lighter, and purpose-built for the job. It rides better in an IWB holster, prints less under clothing, and draws more cleanly from concealment. The G19-sized grip is the dimension the industry settled on for concealed carry decades ago because it works. You’re not giving up meaningful capability for that concealability — the PF940C is a fully capable defensive pistol.
If the pistol is primarily going to live at home — bedside drawer, a quick-access safe, a dedicated home defense station — build the PF940V2. You never need to conceal it, so the compact’s size advantage disappears entirely. What the full-size gives you in return is a longer barrel that extracts more velocity from defensive ammunition, a longer sight radius for faster accurate target acquisition, and more grip for maximum control when your hands might be shaking. Those are real advantages in a home defense scenario.
Carry what you can conceal. For home defense, size is on your side. The PF940C and PF940V2 map cleanly to those two missions.
Which Build Is More Beginner-Friendly?
Genuinely, they’re almost identical in build complexity. Same jig process, same internal parts installation, same function check at the end. If you can build one, you can build the other.
The only tiebreaker for first-timers: the PF940C is the more popular first build by a wide margin, which means there’s more community documentation, more YouTube walkthroughs, and more forum threads to pull from when you hit a question. That depth of community support is a real practical advantage when you’re troubleshooting something at 10pm on a Saturday.
That said, if the V2 is the right frame for your situation, don’t let build complexity be a factor. It isn’t meaningfully harder. Build the one you actually need.
Side-by-Side Comparison
PF940C — Compact
PF940V2 — Full-Size
Glock Compatibility
G19 / G23 (Gen 3)
G17 / G22 (Gen 3)
Calibers
9mm, .40 S&W
9mm, .40 S&W
Grip Length
4-finger — compact
5-finger — full
Concealed Carry
Excellent
Possible, bulkier
Home Defense
Very capable
Ideal
Range / Competition
Good
Better sight radius
Mag Capacity (std)
15+1 rounds
17+1 rounds
Beginner Build
Slightly more docs
Equally manageable
Parts Availability
Massive (G19 base)
Massive (G17 base)
The Recommendation: Who Should Build Which Frame
Build the PF940C (Compact) if you…
• Plan to carry concealed as your primary use case
• Want the most versatile platform that handles carry and home defense
• Have average to smaller hands and prefer a more manageable grip
• Want the deepest community resources for your first build
• Are undecided — the compact is the smarter default
Build the PF940V2 (Full-Size) if you…
• Are building primarily a home defense or range pistol
• Have larger hands and want a full five-finger grip
• Want maximum shootability and a longer sight radius
• Are building a second pistol and already carry a compact
• Are interested in competition shooting or high-volume range use
If you’re genuinely on the fence and can only do one build right now, lean toward the PF940C. It’s the more versatile frame, the community is larger, and it works well for both carry and home use. If you want a full-size down the road, you’ll already know exactly how to build one.
Both frames are excellent. The only wrong choice is picking the wrong one for your actual situation — and now you have enough information to make the right call. Browse the PF940C and PF940V2 frames — along with compatible slides, barrels, parts kits, and jig sets — at polymer80firearms.com. All frames are serialized, ATF-compliant, and ship directly to your local FFL dealer.
