Shipping within 2-3 business days due to high demand

phone: 888-310-0284

Handgun Parts

30 of 45 Items
  • Sale
    Complete RMR Slide Assembly for Glock® 21 Complete RMR Slide Assembly for Glock® 21 Complete RMR Slide Assembly for Glock® 21 Complete RMR Slide Assembly for Glock® 21 Complete RMR Slide Assembly for Glock® 21

    Complete RMR Slide Assembly for Glock® 21

    This optic-ready slide assembly is the perfect way to finish off your Polymer80 .45 ACP build, or upgrade your current Gen 3 G21 pistol. With front and rear serrations, iron sight mounts, and an RMR footprint, this slide is ready for your favorite reflex...

    Was: $269.99
    Now: $249.97
  • Sale
    Ghost Ultimate 3.5 lb Trigger For Glocks® - Gen 1-5

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

    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...

    Was: $17.95
    Now: $13.97
  • Sale
    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,...

    Was: $169.99
    Now: $149.97
  • Sale
    Glock® 21 Compatible Upper Parts Kit

    Glock® 21 Compatible Upper Parts Kit

    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®...

    Was: $109.99
    Now: $94.97
  • Sale
    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...

    Was: $5.99
    Now: $3.97
  • Sale
    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®...

    Was: $3.99
    Now: $2.97
  • Sale
    Sylvan Arms - 9MM Glock® Compensator - 1/2 x 28 RH Sylvan Arms - 9MM Glock® Compensator - 1/2 x 28 RH 2 Sylvan Arms - 9MM Glock® Compensator - 1/2 x 28 RH 3

    Sylvan Arms - 9MM Glock® Compensator - 1/2 x 28 RH

    Sylvan Arms Compensator: The affordable way to better accuracy. Sylvan Arms' 9MM GLOCK® Comp provides an immediate reduction in muzzle rise and felt recoil, dialing in your shot groups with little effort. It installs easily, requiring no custom...

    Was: $89.99
    Now: $69.97
  • Sale
    GLOCK® 21 Compatible Stainless Steel Fluted Barrel 4 GLOCK® 21 Compatible Stainless Steel Fluted Barrel 5 GLOCK® 21 Compatible Stainless Steel Fluted Barrel 6 GLOCK® 21 Compatible Stainless Steel Fluted Barrel GLOCK® 21 Compatible Stainless Steel Fluted Barrel 2

    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...

    Was: $99.99
    Now: $84.97
  • Sale
    P320™ Upper Parts Kit P320™ Upper Parts Kit P320™ Upper Parts Kit P320™ Upper Parts Kit P320™ Upper Parts Kit

    P320™ Upper Parts Kit

    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...

    $63.97 - $89.97
  • Sale
    Glock® 21 Compatible Barrel Glock® 21 Compatible Barrel Glock® 21 Compatible Barrel Glock® 21 Compatible Barrel

    Glock® 21 Compatible Barrel

    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...

    Was: $99.99
    Now: $67.97
  • Sale
    GLOCK® 21 Compatible Stainless Steel Barrel 4 GLOCK® 21 Compatible Stainless Steel Barrel 5 GLOCK® 21 Compatible Stainless Steel Barrel 6 GLOCK® 21 Compatible Stainless Steel Barrel GLOCK® 21 Compatible Stainless Steel Barrel 2

    GLOCK® 21 Compatible Stainless Steel Barrel

    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,...

    Was: $99.99
    Now: $84.97
  • Sale
    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...

    Was: $89.99
    Now: $72.97
  • Sale
    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...

    Was: $224.99
    Now: $149.97
  • Sale
    Glock® 43 Compatible Slide - LFA Elite Black 1 Glock® 43 Compatible Slide - LFA Elite Black 2 Glock® 43 Compatible Slide - LFA Elite Black 3 Glock® 43 Compatible Slide - LFA Elite Black 4

    Glock® 43 Compatible Slide - LFA Elite Black

    The LFA Elite Glock® 43 Compatible Slide is crafted from heat-treated 416R stainless steel for extreme durability. Its finish was done with Elite Series cerakote and heat-treated at RC 45-48. The LFA Elite is compatible with Glock® OEM,...

    Was: $224.99
    Now: $143.97
  • Sale
    Glock® Compatible Non-Adjustable Pyramid Trigger - Black

    Glock® Compatible Non-Adjustable Pyramid Trigger - Black

    The Glock® compatible pistol fits into the category of "most customizable pistols ever." You can upgrade, replace, or otherwise swap out every single part. But before you fix yours up to truly make it your own, start with an upgrade that makes sense,...

    Was: $199.99
    Now: $99.97
  • Sale
    Glock® 17 Compatible Barrel - TiN

    Glock® 17 Compatible Barrel - TiN

    Make your Glock® 17 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...

    Was: $109.99
    Now: $79.97
  • Lower Parts Kit for Glock® 17 Compatible Pistol

    Lower Parts Kit for Glock® 17 Compatible Pistol

    So you're ready to build a 3rd gen Glock® 17 compatible full-sized pistol. You've completed the first step of getting your Glock® 17 compatible 3rd gen full-sized frame ready to go. Now comes the part where you track down all the internal parts...

    $44.99
  • Lower Parts Kit for Glock® 21 Compatible Pistol

    Lower Parts Kit for Glock® 21 Compatible Pistol

    Ready to assemble your PF45 or G21 frame? Grab this kit. This Gen 3 GLOCK® compatible lower parts kit is specifically designed for G21 pistols and Polymer80 PF45 frames. It features OEM-spec components to ensure reliability and an easy installation...

    $74.99
  • Glock® 17 Compatible Upper Parts Kit

    Glock® 17 Compatible Upper Parts Kit

    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...

    $59.99
  • Glock® 17 Compatible Threaded Barrel - Black

    Glock® 17 Compatible Threaded Barrel - Black

    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? Or perhaps you've got a suppressor picked out or are planning to do a solvent trap build? First off,...

    $69.99
  • ROOK Tactical Rear Rail System (Polymer80 PF45)

    ROOK Tactical Rear Rail System (Polymer80 PF45)

    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...

    $49.99
  • Glock® Compatible Barrel Thread Protector - 9mm

    Glock® Compatible Barrel Thread Protector - 9mm

    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...

    $19.99
  • Glock® Compatible Competition Spring Kit

    Glock® Compatible Competition Spring Kit

    So you're saying you're not exactly like me as a gen 1-4 Glock® compatible shooter? So you're saying your performance preferences aren't exactly like mine? Well, I guess you could always customize the crap out of your gen 1-4 Glock® compatible...

    $14.99
  • Glock® 17 Compatible Barrel - Gen 3 5 Glock® 17 Compatible Barrel - Gen 3 6 Glock® 17 Compatible Barrel - Gen 3 Glock® 17 Compatible Barrel - Gen 3 2 Glock® 17 Compatible Barrel - Gen 3 3

    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...

    $59.99
30 of 45 Items

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.