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  • Glock® 43 Compatible Barrel Glock® 43 Compatible Barrel 2 Glock® 43 Compatible Barrel 3 Glock® 43 Compatible Barrel 4 Glock® 43 Compatible Barrel 5

    Glock® 43 Compatible Barrel

    Let us be of assistance in giving your Glock® 43 build the most important part of the upper half. This excellent Glock® 43 compatible barrel, made from certified stress-relieved 416R stainless steel, has been finished using the salt-bath nitride...

    $149.99
  • glock-compatible-tungsten-slide-t19-1 glock-compatible-tungsten-slide-t19-2 glock-compatible-tungsten-slide-t19-3

    Glock® Compatible Slide - T19

    Make your Glock® 19 compatible pistol build a little more custom, and a little less brick with this slide. Sure, it performs as well as an OEM slide, because it meets OEM specs. But this one's got the added bonus of being coated in 4150 tungsten...

    $149.00
  • Glock® 21 Compatible RMR Cut Slide - .45acp Glock® 21 Compatible RMR Cut Slide - .45acp 2 Glock® 21 Compatible RMR Cut Slide - .45acp 3 Glock® 21 Compatible RMR Cut Slide - .45acp 4 Glock® 21 Compatible RMR Cut Slide - .45acp 5

    Glock® 21 Compatible RMR Cut Slide - .45 ACP

    Gen 3 compatible. RMR optic-cut. Ready for your PF45 build. Completing a Polymer80 frame? Ready to upgrade your Gen 3 GLOCK® 21 and throw a red dot on it? This Glock® 21-Compatible, RMR-cut slide is the ticket. It's cut from 416R stainless,...

    $169.99
  • Glock® 17 Compatible Slide w/ Rear Serration Glock® 17 Compatible Slide w/ Rear Serration 2 Glock® 17 Compatible Slide w/ Rear Serration 3 Glock® 17 Compatible Slide w/ Rear Serration 4 Glock® 17 Compatible Slide w/ Rear Serration 5

    Glock® 17 Compatible Slide w/ Rear Serration - FDE

    The greatest advantage of building your G17 pistol is that you get to customize just about every detail of, right down to the color. This FDE slide doesn't just look good, but boasts an excellent performance and compatability, as it's machined to OEM...

    $129.99
  • SSR-3.5˜Super Short Reset 3.5 lb Connector by LANTAC

    SSR-3.5~ Super Short Reset 3.5 lb Connector by LANTAC

    When it comes to brand new Glock® pistols, some people don't like the feel of the factory trigger. But it's alright, fixing a bad trigger pull is one of the simplest jobs you can do on your new sidearm's internal components. What's more, if you're...

    $15.99
  • Glock® 42/43 OEM Polymer Fixed Rear Sight Glock® 42/43 OEM Polymer Fixed Rear Sight 2 Glock® 42/43 OEM Polymer Fixed Rear Sight 3

    Glock® 42/43 OEM Polymer Fixed Rear Sight

    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...

    $9.99
  • Glock® 19 Compatible Slide w/ Rear Serration - FDE Glock® 19 Compatible Slide w/ Rear Serration - FDE 2 Glock® 19 Compatible Slide w/ Rear Serration - FDE 3 Glock® 19 Compatible Slide w/ Rear Serration - FDE 4 Glock® 19 Compatible Slide w/ Rear Serration - FDE 5

    Glock® 19 Compatible Slide w/ Rear Serration - FDE

    Assembling your own Glock 19 pistol with OEM parts doesn't mean it has to be boring or plain. Grab this FDE slide with to add a bit of style to your new 3rd gen pistol. It comes with rear serrations for improved handling as well as 4150 tungsten coating...

    $129.99
  • Glock® Compatible 6.0 lb Trigger Spring – Gen 1-4

    Glock® Compatible 6.0 lb Trigger Spring - Gen 1-4

    You've gotten used to your gen 1-4 double-stack Glock® Compatible pistol's trigger and even think it performs adequately; you'd just like it to be a touch smoother and maybe a tiny bit lighter. No worries, we can help you out with the Glock®...

    $3.99
  • Complete RMR Slide Assembly for Glock 19 Complete RMR Slide Assembly for Glock 19 2 Complete RMR Slide Assembly for Glock 19 3 Complete RMR Slide Assembly for Glock 19 4 Complete RMR Slide Assembly for Glock 19 5

    Complete RMR Slide Assembly for Glock® 19

    This optic-ready slide assembly is the perfect way to finish off your Polymer80 PF940C build, or upgrade your current Gen 3 G19 pistol. With front and rear serrations, iron sight mounts, and an RMR footprint, this slide is ready for your favorite reflex...

    $249.99
  • AmeriGlo 4XL Sight - Glock® Compatible AmeriGlo 4XL Sight - Glock® Compatible 2 AmeriGlo 4XL Sight - Glock® Compatible 3

    AmeriGlo 4XL Sight - Glock® Compatible

    Ameriglo's popular optic- and supressor-ready GLOCK® irons. The Ameriglo 4XL Tall Iron Sights feature bright Tritium for fast and easy sight alignment in all conditions. Made for all GLOCK® slides, the 4XL Sights provide ample post height for...

    $79.99
  • LWD Glock® Compatible Connector - 3.5 lb LWD Glock® Compatible Connector - 3.5 lb 2 LWD Glock® Compatible Connector - 3.5 lb 3 LWD Glock® Compatible Connector - 3.5 lb 4 LWD Glock® Compatible Connector - 3.5 lb 5

    LWD Glock® Compatible Connector - 3.5 lb

    If you're building a double-stack Glock® compatible pistol (model "who cares," gen "so what"), and you've learned enough to know you want a better feel to your trigger than what the OEM or factory slop provides, this is your first step. This is the...

    $14.95
  • gen-3-glock-19-compatible-barrel-1 gen-3-glock-19-compatible-barrel-2 gen-3-glock-19-compatible-barrel-3 gen-3-glock-19-compatible-barrel-4 gen-3-glock-19-compatible-barrel-5

    Gen 3 Glock® 17 Compatible Barrel

    Give that gen 3 Glock® 17 or full-sized Glock® compatible 17 pistol an upgrade with this G17 barrel. Made with proper US craftsmanship, this Gen3 barrel boasts the highest level of quality and accuracy you’ll ever find in any full-sized...

    $69.99
  • gen-3-glock-19-compatible-barrel-2 gen-3-glock-19-compatible-barrel-1 gen-3-glock-19-compatible-barrel-3 gen-3-glock-19-compatible-barrel-4 gen-3-glock-19-compatible-barrel-5

    Gen 1-4 Glock® 19 Compatible Barrel

    Give that gen 1-4 Glock® 19 or mid-sized Glock® compatible 19 pistol an upgrade with this G19 barrel. Made with proper US craftsmanship, this Gen 1-4 barrel boasts the highest level of quality and accuracy you’ll ever find in any full-sized...

    $79.99
  • LWD Glock® Compatible Connector - 3.5 lb G42/43

    LWD Glock® Compatible Connector - 3.5 lb G42/43

    For those of you doing a single-stack Glock® 42 or 43 compatible pistol build project who have decided to opt for a better-than-stock trigger pull, this is your first step. This is the LWD Glock® Compatible 3.5 lb Connector for your 42 and 43...

    $19.95
  • Glock 17 & 19 Compatible RMR Cover Plate - FDE Glock 17 & 19 Compatible RMR Cover Plate - FDE 2

    Glock® 17 & 19 Compatible RMR Cover Plate - FDE

    Look. Maybe you just spent all that money on buying matching FDE-colored parts for and then building a Glock® 17 or 19 or compatible 17 or 19. You even picked out an FDE slide that's already been cut to accept a Trijicon RMR optic sight, or maybe you...

    $16.99
  • LFA Elite Black Glock® 17 Compatible Slide

    LFA Elite Black Glock® 17 Compatible Slide

    The LFA 17 Elite Slide is designed out of 416 stainless steel, which is heat treated at 38-42 HRC for ultimate strength and durability. This slide is lightweight with a smoother ejection compared to others and available with multiple aftermarket...

    $209.99
  • Firing Pin Channel Liner For Glock®

    Firing Pin Channel Liner For Glock®

    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...

    $5.99
  • GLOCK® 26 Compatible Barrel GLOCK® 26 Compatible Barrel 2

    GLOCK® 26 Compatible Barrel

    Give that gen 3 Glock® 26 or subcompact-sized Glock® compatible 26 pistol an upgrade with this G6 barrel. Made with proper US craftsmanship, this Gen3 barrel boasts the highest level of quality and accuracy you’ll ever find in any...

    $79.99
  • LFA Elite FDE Glock® 17 Compatible Slide

    FDE Glock® 17 Compatible Slide by LFA Elite

    The LFA 17 Elite Slide in the FDE color is manufactured out of 416 stainless steel, which is heat treated at 38-42 HRC for maximum strength and durability. This slide is lightweight with a smoother ejection compared to others and available with multiple...

    $209.99
  • Glock® OEM Front Night Sight Glock® OEM Front Night Sight 2 Glock® OEM Front Night Sight 3

    Glock® OEM Front Night Sight

    Genuine GLOCK® OEM front night sight with Tritium. Sometimes, factory is best. The NF17G24 fits all Gen 1 to 5 pistols, including the GLOCK® 17, 19, 22, 23, 24, 26, 27, 33, 34, 35, 37, 38, and 39. GLOCK's® night sights provide simple but...

    $39.99
  • Glock® 17 Compatible Stainless Steel Barrel - Gen 1-4 Glock® 17 Compatible Stainless Steel Barrel - Gen 1-4 2 Glock® 17 Compatible Stainless Steel Barrel - Gen 1-4 3

    Glock® 17 Compatible Stainless Steel Barrel - Gen 1-4

    Customize your new Glock® 17 with a barrel that not only performs well, but looks awesome. With a clean stainless finish, this barrel has been crafted from heat treated 416 stainless steel that makes for tough build that will last. Features: Drop in...

    $79.99
  • Glock® 17 Compatible Barrel - PVD Chameleon Glock® 17 Compatible Barrel - PVD Chameleon 2

    Glock® 17 Compatible Barrel - PVD Chameleon

    "Stock" is boring. Put a sense of style and attitude in your Glock® 17 compatible build. Get a barrel finished with that "oil slick" pattern with this Glock® 17 Compatible Barrel in the PVD Chameleon color. This barrel performs just as well as an...

    $89.99
  • GLOCK® 21 Compatible Stainless Steel Fluted Barrel GLOCK® 21 Compatible Stainless Steel Fluted Barrel 2 GLOCK® 21 Compatible Stainless Steel Fluted Barrel 3 GLOCK® 21 Compatible Stainless Steel Fluted Barrel 4 GLOCK® 21 Compatible Stainless Steel Fluted Barrel 5

    GLOCK® 21 Compatible Stainless Steel Fluted Barrel

    GLOCK® 21 and P80 compatible. Fluted for weight savings. Fully polished stainless. There's a lot of quality packed into this little G21-compatible barrel. It's been forged from high-quality 416R stainless steel, cut and fluted to reduce weight, then...

    $99.99
  • Glock® 43 Compatible RMSC Cut Bull Nose Slide Glock® 43 Compatible RMSC Cut Bull Nose Slide 2 Glock® 43 Compatible RMSC Cut Bull Nose Slide 3 Glock® 43 Compatible RMSC Cut Bull Nose Slide 4 Glock® 43 Compatible RMSC Cut Bull Nose Slide 5

    Glock® 43 Compatible RMSC Cut Bull Nose Slide

    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,...

    $159.99
  • Glock® 17 Compatible Slide w/ Front & Rear Serrations Glock® 17 Compatible Slide w/ Front & Rear Serrations 2 Glock® 17 Compatible Slide w/ Front & Rear Serrations 3 Glock® 17 Compatible Slide w/ Front & Rear Serrations 4 Glock® 17 Compatible Slide w/ Front & Rear Serrations 5

    Glock® 17 Compatible Slide w/ Front & Rear Serrations

    The Agent-17 GLOCK® 17 Compatible Custom Slide has front- and rear-cut slide allows for quick and easy completion of your 80% full-sized pistol build with a serrated, customized, high-quality slide. Wrap-around serrations allow for easy handling and...

    $169.99
  • Glock® 43 Compatible Slide - LFA Elite, FDE Glock® 43 Compatible Slide - LFA Elite, FDE Glock® 43 Compatible Slide - LFA Elite, FDE Glock® 43 Compatible Slide - LFA Elite, FDE Glock® 43 Compatible Slide - LFA Elite, FDE

    Glock® 43 Compatible Slide - LFA Elite, FDE

    The LFA Elite Glock® 43 Compatible Slide in the FDE color is a great-looking way to make your build really stand out. Designed from heat treated 416R stainless steel, this eye-catching slide is extremely durable. It features an elite series cerakote...

    $224.99

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.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.