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  • Sale! P320™ Upper Parts Kit

    P320™ Upper Parts Kit

    Price range: $63.97 through $89.97

    Finish your custom 9mm P320™ slide. This quality, OEM-spec P320™ upper parts kit provides the internals necessary for assembling your custom P320™ slide. It’s also compatible with factory slides, allowing you swap components as needed. P320™ Slide Parts Kit Includes: Slide cap in black, non-textured Striker assembly for 9mm Extractor Extractor Spring Extractor Spring Pin…

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  • Rear Serrated Glock® 17 Compatible Slide - Black Cerakote

    Rear Serrated Glock® 17 Compatible Slide – Black Cerakote

    $139.99

    Factory-Spec 9mm Slide for GLOCK® 17 Builds Built to OEM tolerances for a true drop-in fit, this rear-serrated slide is ideal for completing a G17-pattern build or upgrading a Gen 1–3 GLOCK® 17. Because it’s machined to factory internal dimensions, it delivers the same reliable cycling and lockup you’d expect from an original slide. The…

  • Rear Serrated Glock® 19 Compatible Slide - FDE Cerakote

    Rear Serrated Glock® 19 Compatible Slide – FDE Cerakote

    $139.99

    FDE Factory-spec 9mm Slide for GLOCK® 19 Compatible Builds Add a Flat Dark Earth finish to your G19-pattern build with this factory-spec slide, machined to the same internal tolerances as an original GLOCK® 19 slide for reliable cycling and a proper lockup. It’s a straightforward option for finishing a fresh build or swapping the look…

  • Sale! Rival Arms Compact Guide Rod for Sig Sauer® P320™

    Rival Arms Compact Guide Rod for Sig Sauer® P320™

    Original price was: $39.99.Current price is: $31.99.

    Upgrade your polymer guide rod with stainless steel. The P320™ is one helluva gun — but it isn’t perfect. Sig’s love for polymer is wellknown, but this affinity for plastic can hinder the reliability and accuracy of your favorite pistol. The Rival Arms P320™ Guide Rod is designed to improve both reliability and accuracy, thanks…

  • Sale! Rival Arms Full Size Guide Rod for Sig Sauer® P320™

    Rival Arms Full Size Guide Rod for Sig Sauer® P320™

    Original price was: $39.99.Current price is: $31.99.

    Upgrade your P320™ weak polymer guide rod. The Rival Arms Guide Rod provides a much-needed improvement in reliability, recoil control, and accuracy for your P320™. It features an upgraded spring measuring the stock weight, and a precision-machined stainless steel rod. This steel rod eliminates the risk of cracking and splintering — something polymer can suffer…

  • Sale! ROOK Tactical Rear Rail System (Polymer80 PF45)

    ROOK Tactical Rear Rail System (Polymer80 PF45)

    Original price was: $49.99.Current price is: $39.99.

    Upgrade your Polymer80 PF45’s sticky slide with a precision Rear Rail. The ROOK Tactical Rear Rail System is precision-cut from billet 17-4 stainess steel, ensuring a perfect fit with perfect slide functionality. This easy drop-in upgrade takes just a moment to install, and affords an instant fix for any sticky or gummy slide action. Pair…

  • Sale! SIG SAUER® P320™ XFIVE TXG Caliber X-Change Kit - 9mm, Fiber Optic Front w/ R2 Adjustable Rear, (2) 17 Round Steel Magazines

    SIG SAUER® P320™ XFIVE TXG Caliber X-Change Kit – 9mm, Fiber Optic Front w/ R2 Adjustable Rear, (2) 17 Round Steel Magazines

    Original price was: $799.99.Current price is: $699.97.

    Upgrade your P320™ with an optics-ready slide and tungsten grip. The P320™ XFIVE TXG Caliber X-Change Kit provides the ultimate upgrade for any P320™ chassis. Increasing the weight of your pistol with a tungsten-infused grip module, this kit reduces muzzle flip by up 50%. Enjoy quicker follow-up shots and better accuracy thanks to the slide’s factory optic…

  • Sale! Standard Height Fiber Optic Sights for Sig Sauer® P320™

    Standard Height Fiber Optic Sights for Sig Sauer® P320™

    Original price was: $42.99.Current price is: $26.99.

    Factory-height fiber optic iron sights. An easy upgrade. Improve the target acquisition and sighting on your P320™ with these fiber optic iron sights. Features OEM fitment with tap-in dovetail installation. Durable alloy construction — no cheap polymers. Includes red, green and yellow fiber optic rods to customize sight color. Fiber Optic P320™ Iron Sight Features…

  • Sale! Standard Height Fiber Optic Sights for Sig Sauer® P365™

    Standard Height Fiber Optic Sights for Sig Sauer® P365™

    Original price was: $42.99.Current price is: $23.99.

    Enhance your accuracy with upgraded irons. These fiber optic iron sights are the perfect first upgrade for your Sig P365. Providing red, green, and yellow fiber iron rods, these customizable sights enhance your sight picture — especially in low light conditions — to provide a better point of aim and quicker follow-up shots. Fiber Optic…

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

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

    $79.99

    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 fit for Gen 1-4 Machined from 416 stainless steel and heat treated…

  • Sale! GLOCK® 26 Compatible Barrel

    GLOCK® 26 Compatible Barrel

    Original price was: $79.99.Current price is: $49.97.

    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 subcompact-sized pistol. Manufactured from heat-treated 416R stainless, this Gen3 barrel will guarantee consistent shop shot groups…

  • Glock® 17 Compatible Upper Parts Kit

    Glock® 17 Compatible Upper Parts Kit

    $59.99

    If you’ve decided on the 80% route to build yourself a gen 3 Glock® 17 compatible pistol, then you gotta get an upper parts kit to match. We can assist you with that. Glock® 17 Compatible Upper Parts Kit is just what you need. It comes with all the necessary internal parts to turn that…

  • Sale! Glock® 21 Compatible Upper Parts Kit

    Glock® 21 Compatible Upper Parts Kit

    Original price was: $109.99.Current price is: $94.97.

    Building a custom G21 or PF45 slide? You need this slide parts kit. Ready to build a custom GLOCK® slide for your Gen 3 pistol or Polymer80 build? You need to pair it with a parts kit like this one. We’ve got your PF45 build (or factory GLOCK® 21) covered with a quality, OEM-style slide…

  • Glock® 19 Compatible Upper Parts Kit

    Glock® 19 Compatible Upper Parts Kit

    $54.99

    If you’ve decided on the 80% route to build yourself a gen 3 Glock® 19 compatible pistol, then you gotta get an upper parts kit to match. We can assist you with that. Glock® 19 Compatible Upper Parts Kit is just what you need. It comes with all the necessary internal parts to turn that…

  • Sale! Ghost Ultimate 3.5 lb Trigger For Glocks® - Gen 1-5

    Ghost Ultimate 3.5 lb Connector For Glock® – Gen 1-5

    Original price was: $17.95.Current price is: $13.97.

    For those of us who really put work in with our double-stack Glock® compatible pistols, we have to take extra care of our sidearms, so we don’t have to spend more time cleaning the crap out of ’em after a good training session or duty. Too much debris inside, too much filth and grime build-up,…

  • Glock® 19 Compatible Threaded Barrel - Stainless Steel

    Glock® 19 Compatible Threaded Barrel – Stainless Steel

    $79.99

    Got plans to improve the performance of your Glock® 19 compatible build even further by going with a barrel, to allow you to install a muzzle device? Got plans too to improve the aesthetic appeal by going with one with a lustrous stainless steel finish? Or perhaps you’ve got a suppressor picked out or are…

  • Glock® 19 Compatible Threaded Barrel - Black

    Glock® 19 Compatible Threaded Barrel – Black

    $79.99

    Got plans to improve the performance of your Glock® 19 compatible build even further by going with a barrel, to allow you to install a muzzle device? Or perhaps you’ve got a suppressor picked out or are planning to do a solvent trap build? First off, we’re not cheering you on if you’re plan on…

  • Glock® 17 Compatible Threaded Barrel - Stainless Steel

    Glock® 17 Compatible Threaded Barrel – Stainless Steel

    $79.99

    Got plans to improve the performance of your Glock® 17 compatible build even further by going with a barrel, to allow you to install a muzzle device? Got plans to refine its look by going with stainless steel instead of black? Or perhaps you’ve got a suppressor picked out or are planning to do a…

  • Sale! Glock® 26 Compatible Barrel - TiN

    Glock® 26 Compatible Barrel – TiN

    Original price was: $99.99.Current price is: $59.97.

    Make your Glock® 26 or compatible build look like it was forged in the fires of the ancient Greek Mount Olympus by Hephaestus himself by adding a barrel coated in titanium nitride, or TiN. Exact some godlike vengeance on paper targets with accuracy and precision at your local range. This is a titanium nitride-coated Glock®…

  • Sale! Glock® Compatible Barrel Stainless Steel Thread Protector - 9mm 1

    Glock® Compatible Barrel Stainless Steel Thread Protector – 9mm

    Original price was: $19.99.Current price is: $16.99.

    Got a threaded barrel on your 9mm Glock®? Chances are, your muzzle device isn’t installed all the time — like when you’ve removed your suppressor or muzzle brake to make concealed carry easier. But leaving your barrel’s threads exposed — especially in a holster — increases the risk of damage. Cover that threading up with…

  • Glock® Compatible Barrel Thread Protector - 9mm

    Glock® Compatible Barrel Thread Protector – 9mm

    $19.99

    Having a threaded barrel on your 9mm Glock® compatible pistol doesn’t mean you have to have a muzzle device or suppressor attached at all times. Sometimes, for storage or EDC, or whatever the case may be, you find a reason to take the attachment off the end of the barrel. When that happens, it’s smart…

  • Sale! Glock® 17 Compatible Barrel - PVD Chameleon

    Glock® 17 Compatible Barrel – PVD Chameleon

    Original price was: $89.99.Current price is: $62.99.

    “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 OEM barrel, but you’ll also have that cool eye-popping, head-turning, super…

  • Sale! Glock® 19 Compatible Barrel - PVD Chameleon

    Glock® 19 Compatible Barrel – PVD Chameleon

    Original price was: $89.99.Current price is: $59.97.

    “Stock” is boring. Put a sense of style and attitude in your Glock® 19 compatible build. Get a barrel finished with that “oil slick” pattern with this Glock® 19 Compatible Barrel in the PVD Chameleon color. This barrel performs just as well as an OEM barrel, but you’ll also have that cool eye-popping, head-turning, super…

  • Sale! Glock® Compatible 6.0 lb Trigger Spring – Gen 1-4

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

    Original price was: $3.99.Current price is: $2.97.

    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® Compatible 6.0 lb Trigger Spring for your gen 1-4 shooter. Though it…

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.

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