This website contains content related to firearm components and building tools. Access is strictly limited to persons of legal age according to their jurisdiction. By entering this site, you affirm and certify the following:
1. I am at least 18 years old for long gun components 2. I am at least 21 years old for handgun components 3. I am NOT a prohibited person under federal law (18 U.S.C. § 922(g)) 4. I am in a jurisdiction where accessing this content is legal 5. I understand that misrepresentation may constitute a crime
Almost every article on this topic gives you price ranges so wide they tell you nothing. ‘Expect to spend anywhere from $300 to $900’ is technically accurate and completely useless for making a purchasing decision. This article is going to do something different: give you real numbers, explain exactly where those numbers come from, and tell you honestly where a Polymer80 build costs more than a factory gun and where it costs less.
The numbers below are based on current retail pricing for quality components — not the cheapest possible parts that will disappoint you, and not boutique premium components that most builders don’t need. Two tiers: a budget build that uses functional, reliable components at the lowest reasonable cost, and a mid-range build that represents what most thoughtful first-time builders actually end up with when they’re done. Both produce a reliable, capable pistol.
All prices reflect the PF940C compact frame build — the most common first Polymer80 build and the most comparable to a factory Glock G19.
Table of Contents
Component-by-Component: What Each Part Actually Costs
• The Frame: $149
The PF940C serialized frame from polymer80firearms.com is a fixed cost regardless of which build tier you’re targeting. It’s $149, it ships to your local FFL dealer, and it’s the serialized component that makes this a regulated firearm transaction. No variance here — this is your starting point.
• FFL Transfer Fee: $25–$35
This is the fee your local FFL dealer charges to receive the frame, hold it, process your Form 4473, and run your background check. Most gun shops fall in the $25–$35 range for a standard handgun transfer. Some charge as low as $15 and some charge $50 in higher cost-of-living areas. Call your dealer before you order. This cost is the same whether you’re buying a Polymer80 frame or a factory Glock online.
• Slide Assembly: $180–$260
The slide is typically the second-largest cost after the frame. A functional, complete slide assembly from a manufacturer like Lone Wolf in the standard Glock 19-compatible spec runs around $180. Step up to a Zaffiri Precision slide with an optics cut and improved serration geometry and you’re at roughly $230–$260. Both are quality options — the difference is finish quality, the presence or absence of an optics cut, and the aesthetic of the serration pattern. For a carry build where you want an optics cut, budget for the mid-range slide.
• Barrel: $65–$110
A quality 9mm G19-compatible barrel in standard 4-inch profile from a reputable manufacturer — Lone Wolf, Faxon, or comparable — runs $65–$80. A match-grade barrel or a threaded barrel for a suppressor-ready build adds $30–$50 to that. Don’t buy a $35 no-name barrel to save money on a pistol you intend to carry. The barrel is the component that determines where your bullets actually go. Spend the $65.
• Recoil Spring Assembly: $18–$22
Standard Glock-pattern recoil spring assembly. This is not where you optimize cost. An OEM or quality aftermarket RSA runs $18–$22. The difference between a $12 spring and a $20 spring is reliability over round count. Buy the $20 spring.
• Internal Parts Kit: $55–$75
The internal parts kit covers everything that goes inside the fire control group: trigger assembly, trigger housing, trigger bar, connector, locking block, slide lock lever, magazine release, and all associated pins and springs. A quality mil-spec compatible parts kit in this category runs $55–$65. A step-up kit with a polished connector, improved trigger spring, and better component finish is $70–$75. The mid-range kit is worth the extra $10–$15 for what it does to the trigger feel right out of the box.
• Sights: $0 or $95
A budget build uses whatever irons come with the slide. A build you actually trust — especially for carry — gets XS Big Dot Tritium night sights at approximately $95, available at polymer80firearms.com. This is the single upgrade that makes the most practical difference on a defensive build, and the one cost most budget breakdowns underplay. On a mid-range build, it’s not optional.
• Trigger Upgrade: $0 or $35
Budget build runs the stock connector and spring from the parts kit. Mid-range build adds a Smith Defense connector ($18–$22) and a quality spring kit ($12–$15) for a total of approximately $35. As covered in the trigger upgrade guide, this is the highest-impact single parts upgrade and the one that consistently produces a shootable improvement.
• Tools — First Build Only: $85
The jig kit matched to the PF940C runs $55. Add a basic punch set ($15–$20) and a rubber mallet ($8–$12) and you’re at $80–$87 in one-time tool costs. These tools are used for every subsequent build you do. Amortized across two builds, the tool cost is $42. Across five builds, it’s $17 per build. If you’re planning to build more than once — and most people do — the tool investment pays for itself quickly.
The jig kit is the one tool cost that’s specific to Polymer80 builds. The punch set and mallet you’d need for any pistol build. Consider the $55 jig kit the only true ‘build tax’ on a Polymer80 vs. a factory gun.
Full Cost Breakdown at a Glance
Component
Budget Build
Mid-Range Build
Notes
PF940C Serialized Frame
$149
$149
Fixed cost — same frame regardless of build tier
FFL Transfer Fee
$25–$35
$25–$35
Varies by dealer; call ahead to confirm
Slide Assembly (complete)
$180
$260
Budget: Lone Wolf / basic. Mid: Zaffiri Precision, optics-cut
Barrel (9mm, 4″)
$65
$110
Budget: standard profile. Mid: match-grade or threaded
Recoil Spring Assembly
$18
$22
OEM or quality aftermarket; don’t cheap out here
Internal Parts Kit
$55
$75
Trigger group, pins, springs, slide lock, mag release
Night Sights (tritium)
$0
$95
Budget build uses slide irons; mid-range: XS Big Dot or HD
Trigger Upgrade (connector + springs)
$0
$35
Budget: stock trigger. Mid: Smith Defense connector + spring kit
Jig Kit (first build only)
$55
$55
One-time tool cost — reused on every subsequent build
Basic Tools (punch set, mallet, mat)
$30
$30
One-time cost — standard across any pistol build
—
—
—
—
FIRST BUILD TOTAL
$577–$597
$836–$866
Includes all one-time tool costs
SECOND BUILD (tools owned)
$492–$512
$751–$781
Jig + basic tools already paid for
Polymer80 Build vs. Factory Glock G19: The Real Comparison
Here’s where it gets interesting — and where most cost comparisons get dishonest by only showing the Polymer80 parts cost against the full factory Glock price.
A factory Glock G19 Gen 5 retails at $499–$549. That includes everything — frame, slide, barrel, sights, and all internal components. It looks cheaper than a Polymer80 build until you account for what most G19 owners actually do: replace the factory polymer sights ($90–$115 for tritium), upgrade the connector and springs ($30–$60), and occasionally swap the trigger shoe. A fully upgraded G19 that’s carry-ready lands at $619–$724 at minimum — within the same range as a comparable Polymer80 build.
Polymer80 PF940C Build
Factory Glock G19 Gen 5
Base pistol cost
$149 (frame)
$499–$549 (MSRP)
Add: slide + barrel + springs
+$263–$392
Included
Add: parts kit
+$55–$75
Included
Add: FFL transfer
+$25–$35
+$0 (in-store purchase)
Add: sights upgrade
+$0–$95
+$90–$115 (stock sights need replacing)
Add: trigger upgrade
+$0–$35
+$30–$60 (connector + springs)
Add: first-build tools
+$85
N/A
Subtotal (as-built)
$577–$866
$619–$819
Ergonomic upgrades included
Yes — beavertail, grip angle, texture
No — stock Glock ergonomics
Build experience / knowledge
Yes
No
Factory warranty
Parts warranty via dealer
Glock factory warranty
Where Things Actually Land — Total All-In Cost
• First Polymer80 build (budget): $577–$597
• First Polymer80 build (mid-range): $836–$866
• Second build onward (budget): $492–$512
• Second build onward (mid-range): $751–$781
• Factory Glock G19 Gen 5 (stock): $499–$549 (stock, no upgrades)
• Factory Glock G19 Gen 5 (with upgrades): $619–$724 (with sights and trigger upgrades)
Where the Build Costs More and Where It Doesn’t
Build costs more on the first build, period. The $85 in tools is real money that a factory gun purchase doesn’t require. If you build once and never again, the Polymer80 route has a genuine cost premium of $50–$80 over a comparably upgraded factory G19. That’s the honest number.
Build costs less from the second build forward. No tools to buy, no sights to replace (you already own them if you set up a separate sight-specific budget), and a better understanding of where to source components efficiently. Second builds typically come in $60–$100 cheaper than the first, and that gap widens with experience.
Build delivers more per dollar in one specific way: the Polymer80 frame’s ergonomic improvements — the grip angle, beavertail, and texture — are built in from day one. Replicating those features on a factory Glock requires a grip stippling job ($80–$150 from a gunsmith) or a grip module replacement. On a Polymer80 build, they’re part of the frame you’re already buying.
The most honest summary: a Polymer80 build and a properly upgraded factory G19 cost about the same when all-in costs are compared fairly. The Polymer80 adds a one-time tool cost and pays it back in ergonomic quality, build knowledge, and a lower cost per subsequent build. That’s the real math.
Browse PF940C frames, complete slide assemblies, parts kits, XS Big Dot sights, and jig kits at polymer80firearms.com. Everything in this breakdown is available in one place, and the support team can help you spec the right build tier for your budget.
