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Handgun Parts

  • 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® 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® 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
  • 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®...

    $104.99
  • 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® 19 Compatible Threaded Barrel - Black

    Glock® 19 Compatible Threaded Barrel - Black

    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,...

    $79.99
  • 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 Slide w/ RMR Optic Cut Slide Glock® 17 Compatible Slide w/ RMR Optic Cut Slide 2 Glock® 17 Compatible Slide w/ RMR Optic Cut Slide 3 Glock® 17 Compatible Slide w/ RMR Optic Cut Slide 4 Glock® 17 Compatible Slide w/ RMR Optic Cut Slide 5

    Glock® 17 Compatible Slide w/ RMR Optic Cut Slide

    When building your Glock® 17 pistol, you'll want to ensure that it not only shoots accurately, but can be simple to aim. Well, this slide comes with an RMR cut, so you can add a sight of your preference. It features a  front- and rear-cut slide...

    $149.99
  • 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 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
  • 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
  • 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...

    $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
  • Frame Insert Jig for SIG SAUER® P320™ Frame Insert Jig for SIG SAUER® P320™ Frame Insert Jig for SIG SAUER® P320™ Frame Insert Jig for SIG SAUER® P320™ Frame Insert Jig for SIG SAUER® P320™

    Frame Insert Jig for SIG SAUER® P320™

    Turn your MUP-1 80% Insert Into a Working P320 Chassis. The MUP-1 80% Jig provides the guides and tools necessary for fabricating your unfinished P320-compatible MUP-1 Fire Control Insert. This quality steel jig ensure your unfinished insert is cut and...

    $209.99
  • 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
  • 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...

    $42.99
  • 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
  • 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
  • LFA Elite Black Glock® 17 Compatible Slide 1 LFA Elite Black Glock® 17 Compatible Slide 2 LFA Elite Black Glock® 17 Compatible Slide 3 LFA Elite Black Glock® 17 Compatible Slide 4

    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
  • Glock® 19 Compatible Slide w/ Rear Serration 1 Glock® 19 Compatible Slide w/ Rear Serration 2 Glock® 19 Compatible Slide w/ Rear Serration 3 Glock® 19 Compatible Slide w/ Rear Serration 4

    Glock® 19 Compatible Slide w/ Rear Serration

    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® 19 Compatible Slide w/ Rear Serration - FDE 1 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

    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® 17 Compatible Slide w/ Rear Serration - FDE 1 Glock® 17 Compatible Slide w/ Rear Serration - FDE 2 Glock® 17 Compatible Slide w/ Rear Serration - FDE 3 Glock® 17 Compatible Slide w/ Rear Serration - FDE 4

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

    Rival Arms Compact Guide Rod for Sig Sauer® P320™

    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...

    $34.99

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.