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  • Sale! Compact Barrel for Sig Sauer® P320™ - Nitride Black

    Compact Barrel for Sig Sauer® P320™ – Nitride Black

    Original price was: $74.99.Current price is: $39.97.

    Forged from match-grade 416R stainless. Nitrided. Improve the accuracy of your P320™ Compact quickly and easily with this upgraded drop-in barrel. It’s forged from Crucible 416R Stainless — the same steel developed specifically for F-class bench rifles — and it’s been treaded with QPQ Nitride to promote the highest wear resistance possible, without any internal…

  • Sale! Compact Barrel for Sig Sauer® P320™ - TiN

    Compact Barrel for Sig Sauer® P320™ – TiN

    Original price was: $74.99.Current price is: $31.99.

    Gold-tier performance for your P320™ Compact. This gold TiN P320™ barrel provides the best in accuracy and aesthetics. Forged from Crucible 416R stainless, broach rifled for better accuracy, and finished in a micron-accurate Titanium Nitride coating, this 9mm compact barrel’s the key to maximizing accuracy in your P320™ Compact. TiN P320™ Barrel Features Forged from…

  • Complete Slide Kit - LFA Elite RMR Optic Cut Glock® 19 Compatible Slide - Black Cerakote

    Complete Slide Kit – LFA Elite RMR Optic Cut Glock® 19 Compatible Slide – Black Cerakote

    Price range: $319.99 through $339.99

    Forged, Vented-Cut Slide Kit for GLOCK® 19 Compatible Builds Get a lighter, optic-ready upper without piecing parts together yourself. This kit pairs our forged LF19 Elite slide — vented RMR cut, matte Black Cerakote — with your choice of barrel and a full upper parts kit, leaving just sights (and your red dot, if you’re…

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  • LFA Elite FDE Glock® 19 Compatible Complete Slide Kit w/ Black Nitride Barrel

    Complete Slide Kit – LFA Elite RMR Optic Cut Glock® 19 Compatible Slide – FDE Cerakote

    Price range: $319.99 through $339.99

    Forged, Vented, Optic-Ready Slide Kit in Flat Dark Earth Skip the piecemeal parts run and build a lighter, optic-ready upper in FDE all in one order. This kit bundles our forged LF19 Elite slide with your choice of barrel and a full upper parts kit — just add sights or your red dot of choice…

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  • Complete Slide Kit - Rear Serrated Glock® 17 Compatible Slide - Black Cerakote

    Complete Slide Kit – Rear Serrated Glock® 17 Compatible Slide – Black Cerakote

    $249.99

    Everything Needed to Finish Your G17 Upper — Slide, Barrel, and Internals in One Box Finish the upper half of your G17-pattern build without sourcing parts one at a time. This kit bundles our OEM-spec, rear-serrated slide with your choice of barrel and a full upper parts kit, so the only thing left to add…

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  • Complete Slide Kit - Rear Serrated Glock® 19 Compatible Slide - FDE Cerakote

    Complete Slide Kit – Rear Serrated Glock® 19 Compatible Slide – FDE Cerakote

    Price range: $239.99 through $249.99

    Everything Needed to Finish Your Upper — Slide, Barrel, and Internals in One Box Give your G19-pattern build a Flat Dark Earth look without sourcing parts one at a time. This kit bundles our FDE Cerakote slide with your choice of barrel and a full upper parts kit, so the only thing left to add…

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  • Sale! ETS G43 7-Round Mag (9mm) + Pearce Grip Extension

    ETS G43 7-Round Mag (9mm) + Pearce Grip Extension

    Original price was: $29.99.Current price is: $21.97.

    Situational awareness counts. That’s why ETS has taken the idea of counting your rounds to the next level with their see-through magazines. Designed for the G43 platform, this 7-round mag allows you to keep track of your rounds without sacrificing reliability or ruggedness. ETS Magazines are made from a weather-, UV- and temperature-resistant polymer with…

  • Sale! Firing Pin Channel Liner For Glock®

    Firing Pin Channel Liner For Glock®

    Original price was: $5.99.Current price is: $3.97.

    This OEM firing pin channel liner fits all GLOCKs. Not required for GLOCK® 42 or G43. The firing pin channel liner’s a critical component of any GLOCK® or Polymer80 slide. This liner is considered a single-use component; removal requires replacing the liner. Damaging the liner during installation will also require replacement. Firing Pin Channel Liner…

  • Sale! Government Model 5" FS - 9MM Parkerized

    Full-Sized 5″ 1911 Barrel – 9mm

    Original price was: $64.99.Current price is: $49.97.

    A quality 9mm 1911 barrel. Simple. A good barrel doesn’t need to cost three figures. This parkerized 5″ (full-size”) 9mm 1911 barrel provides the tight groupings you need for your classic hammer gun. Its matte black Parkerizing protects against rust and fouling, while matching the original 1911’s finish. Barrel Specs & Features Size: Government Model…

  • Sale! Ghost Inc., Edge Connector 3.5 lb, Fits Glock Generation 1-5, Drop-In

    Ghost Inc., Edge Connector 3.5 lb, Fits Glock® Generation 1-5, Drop-In

    Original price was: $24.95.Current price is: $14.99.

    Improve your GLOCK® or P80 trigger pull. Ghost Inc.’s “Ghost Edge” 3.5 connector provides some much-needed improvements over the OEM connector found in your typical GLOCK®. These connectors are also compatible upgrades for your Polymer80 pistol’s parts kit, ensuring your freshly drilled P80 frame and new trigger assembly provides a smooth, clean, crisp trigger pull,…

  • Glock® 17 Compatible Pistol Build Kit - Rear Serrated Slide - Black Cerakote

    Glock® 17 Compatible Pistol Build Kit – Rear Serrated Slide – Black Cerakote

    Price range: $289.99 through $299.99

    Frame-to-Range Build Kit for Full-Size G17 Builds Have a stripped G17-compatible frame ready to go? This kit rounds out everything else — slide, barrel, and both parts kits — so you can finish your build and head to the range. The slide is OEM-spec: machined from 416R stainless to factory internal dimensions and sight cuts,…

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  • Glock® 17 Compatible Threaded Barrel with Stainless Steel Thread Protector

    Glock® 17 Compatible Threaded Barrel with Stainless Steel Thread Protector

    $89.99

    Precision rifling with 17-4 Stainless, for better accuracy. This Glock® 17-Compatible, threaded barrel provides a quick n’ easy upgrade for your factory G17 or Polymer80 PF940v2 build. With precision-cut rifling formed from 17-4 stainless, this barrel guarantees MOA accuracy. Attach a 9mm suppressor via the 1/2×28 threads for quiet, confident performance. Pair with a custom…

  • Glock® 19 Compatible Pistol Build Kit - LFA Elite RMR Optic Cut Slide - Black Cerakote

    Glock® 19 Compatible Pistol Build Kit – LFA Elite RMR Optic Cut Slide – Black Cerakote

    Price range: $349.99 through $379.99

    Frame-to-Range Build Kit with a Forged, Vented, Optic Cut Slide If you’ve got a stripped G19-compatible frame waiting, this kit brings everything else — slide, barrel, and both parts kits — built around a lighter, forged slide instead of a standard machined one. It’s a step up for builders who want reduced slide mass and…

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  • Glock® 19 Compatible Pistol Build Kit w/ FDE Elite Slide, Black Nitride Barrel, Upper Parts Kit, and Lower Parts Kit

    Glock® 19 Compatible Pistol Build Kit – LFA Elite RMR Optic Cut Slide – FDE Cerakote

    Price range: $349.99 through $379.99

    Frame-to-Range Build Kit with a Forged, FDE-Finished Slide Have a stripped G19-compatible frame on hand? This kit fills in the rest — slide, barrel, and both parts kits — built around our lighter, forged LF19 Elite slide instead of a standard machined one, finished in Flat Dark Earth. Large cooling vents and top ports cut…

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  • Glock® 19 Compatible Pistol Build Kit - Rear Serrated Slide - FDE Cerakote

    Glock® 19 Compatible Pistol Build Kit – Rear Serrated Slide – FDE Cerakote

    Price range: $279.99 through $299.99

    Frame-to-Range Kit for FDE-Finished G19 Builds Already have a stripped G19-compatible frame? This kit rounds out everything else you need — slide, barrel, and both parts kits — finished in Flat Dark Earth for a build that stands out from the usual black-on-black setup. The slide is machined from 416R stainless to OEM internal dimensions…

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  • Sale! Glock® 21 Compatible Barrel

    Glock® 21 Compatible Barrel

    Original price was: $99.99.Current price is: $67.97.

    Top-tier performance at an unbeatable price For consistent cycling and optimal accuracy across all .45 ACP loads, relying on factory-spec components such as this DLC-coated, G21-compatible barrel is a wise choice. Barrel Compatibility This barrel fits all Gen 1 to Gen 4 GLOCK® 21 pistols. Barrel Features Size: .45 ACP Barrel Length: 4.5″ Twist Rate:…

  • Sale! GLOCK® 21 Compatible Stainless Steel Barrel 4

    GLOCK® 21 Compatible Stainless Steel Barrel

    Original price was: $99.99.Current price is: $59.99.

    Factory Gen 3 and Polymer80 Compatible. Full stainless. This GLOCK® 21-compatible stainless barrel provides high accuracy and good looks at a great price. With a fully polished finish, this barrel’s more resistant to corrosion and easier to clean, and its polished feed ramps provide more reliable feeding. Pair with your factory Gen 3 GLOCK® 21,…

  • Sale! Glock® 42/43 OEM Polymer Fixed Rear Sight

    Glock® 42/43 OEM Polymer Fixed Rear Sight 6.1mm

    Original price was: $9.99.Current price is: $3.99.

    GLOCK’s® factory “poly” fixed rear sight for G42/43. Keep it simple and save your cash (for that sweet barrel or trigger). The polymer 6.1mm factory rear sight provides a quick and simple solution for your G42 and G43. Use it to finish your P80-equivalent build, or just upgrade your factory handgun. This sight uses the…

  • Sale! Glock® 42/43 OEM Rear Night Sight

    Glock® 42/43 OEM Rear Night Sight

    Original price was: $59.99.Current price is: $31.99.

    Low-profile OEM Rear Night Sight for your favorite carry pistol. The GLOCK® 42 and 43 provide excellent concealment and reliability, and GLOCK’s® OEM rear night sight — tailored specifically for these small slides and frames — is no different. Filled with genuine Tritium, the G42/43 Rear Night Sight provides up to 12 years of reliable…

  • Sale! Glock® 43 Compatible - Standard Cut Slide (FDE) 1

    Glock® 43 Compatible – Standard Cut Slide (FDE)

    Original price was: $139.99.Current price is: $69.99.

    Factory fitment, with a rugged Cerakote finish. This GLOCK® 43-Compatible slide works with the PF9SS 80% frame. Front and rear serrations provide easy racking and press checks, while the matte Flat Dark Earth Cerakote finish provides total protection against rust, carbon fouling, and solvents. Factory-style iron sight mounts make installing a pair of GLOCK® sights…

  • Sale! Glock® 43 Compatible RMSC Cut Bull Nose Slide 1

    Glock® 43 Compatible RMSC Cut Bull Nose Slide

    Original price was: $189.99.Current price is: $119.97.

    Improved serrations, better looks, and RMSc-cut. This upgraded GLOCK® 43 slide provides the perfect upgrade for your Gen 3 factory pistol or your Polymer80 PF9SS build. It sports 3D cut and raised front and rear serrations, a slick bull nose front, and a durable black powdercoated finish with standard iron sight cuts and an RMSc…

  • Sale! Glock® OEM Front Sight

    Glock® OEM Front Sight

    Original price was: $19.99.Current price is: $13.97.

    Finish your frame with a factory GLOCK® Front Sight. Ready to finish your P80 frame? Or need to swap out your factory pistol’s front sight? Grab the OEM Steel Front Sight. This simple, universal-fit sight is compatible with all GLOCK® models across all generations. Includes mounting screw.   DISCLAIMER: “GLOCK” is a federally registered trademark…

  • Sale! Glock® OEM Rear Night Sight

    GLOCK® OEM Rear Night Sight. 6.5mm tall, with Tritium.

    Original price was: $59.99.Current price is: $39.97.

    Genuine GLOCK® OEM Rear Night Sight. 6.5mm tall, with Tritium. Want classic quality? Keep it simple and grab the OEM rear night sight from GLOCK®. It sports bright Tritium dots that make target acquisition and sight alignment in low-light conditions easier and faster. Pair with the OEM front night sight (also available here) and you’ll…

  • FDE Glock® 19 Compatible Slide by LFA Elite 1

    LFA Elite RMR Optic Cut Glock® 19 Compatible Slide – FDE Cerakote

    $214.99

    Forged, Vented 9mm Slide in Flat Dark Earth Give your G19-pattern build a lighter feel and a Flat Dark Earth finish with this forged 416R stainless slide. Unlike a standard machined slide, the forged construction shaves noticeable weight while still holding up to heavy use — a good fit for builders chasing faster follow-up shots…

U.S.-made handgun parts for GLOCK, Polymer80 and 1911.

Building a custom GLOCK-compatible P80 handgun or 1911 from scratch? Want to upgrade your factory pistol with some high-performance components? You’re in the right place: We have a quality selection of US-made parts, barrels, slides, internals, and accessories for those platforms. Whether you need a threaded barrel, ported and optic-cut slide, parts kit, or an upgraded trigger, we have you covered.

Handgun Parts to Upgrade Your GLOCK or 1911

Building a P80-framed hand? Grab a GLOCK-compatible parts kit to to finish your build after fabricating your frame. Take the opportunity to upgrade with a custom slide and barrel, too! We’ve sourced a quality selection of GLOCK slides that include unique coatings, RMR cuts for a micro red dot, and lightweight designs.

Custom 1911 and P80 parts

Custom 1911s can fetch premium prices. But if you want to own a custom .45 or 9mm, you don’t have to pay those high prices. Fabricating your 1911 from an aluminum 80% frame means you get to cherry-pick the upgraded parts you want to finish your build. Pair your frame with the Stealth Arms 1911 Jig to start fabricating. Once fabricated, you can install your upgraded 1911 barrel, slide, and parts kit.

How to Complete an 80% 1911 Frame

State Laws Vary

Some states have banned certain firearm parts, including parts available and shown here. We cannot fulfill orders placed by residents in those restricted states. Check your local and state laws, and please confirm whether we can ship to your state before ordering.


DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

DISCLAIMER: “GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither Gun Builders Depot, a/k/a GunBuilders.com nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.

DISCLAIMER: “Sig Sauer” is a federally registered trademark of Sig Sauer, Inc. and is one of many trademarks owned by Sig Sauer, Inc. Neither GunB Builders Depot, a/k/a GunBuilders.com nor this site are affiliated in any manner with, or otherwise endorsed by, Sig Sauer, Inc. The use of “Sig Sauer” on this page is merely to advertise the sale of Sig Sauer pistols, parts, or components. For additional genuine Sig Sauer, Inc. products and parts visit www.sigsauer.com.