DISCLAIMER/WARNING: Please PAY ATTENTION TO WHAT YOU'RE PURCHASING.
Starting 5/5, We will no longer verify if you understand what you're ordering. If you ordered incorrectly and items has been shipped then you will incur a 20% Restock FEE if you wish to cancel or do a return/refund.
If ANY of these Items are sold out/gray color/unable to select/crossed out, this means that the ENTIRE product is OUT of Stock.
If you select "NONE" for Lower Parts Kit (LPK) and/or Sights, this means the kit DOES NOT come with those items.
If you select "NONE" or "STANDARD" Ejector, this means you will received whatever ejector comes with your Lower Parts Kit (LPK)
If you select "UPGRADED" Ejector, this means you will received either a Gen4 or Gen5 G19x Upgraded Ejector. It's our choice what we include on your kit.
MDX Arms Build Kit Contents:
- Polymear80 80% Frame Kit with Jig and tooling - PF940SC (metal rails, newest version)
- Glock OEM Polymer Sights -OBVIOUSLY if the option says "none" this means its not included
- Glock OEM Guiderod
- Lower Parts Kit (LPK) -OBVIOUSLY if the option says "none" this means its not included
- Slide Parts Kit (SPK) * Channel Liner Already installed on slides
- Match Grade Drop-In Barrel
- MDX Arms US Made CNC 416R Slide
- Channel Liner Installed
*All Build Kits comes un-assembled.
*If you purchase Sights, They will come UNINSTALLED
Details About PF940SC 80% Frame:
- Enhanced Ergonomics and Features
- High-Strength Reinforced Polymer Construction
- Aggressive and Adaptable Grip Texture
- Picatinny/STANAG Compliant Accessory Rail
- Blank Serialization Plate
- Stainless Steel Locking Block Rail System (LBRS™)
- Stainless Steel Rear Rail Module (RRM™)
- Hardened Pins for LBRS ™ and RRM™
- Complete Finishing Jig, Drill bits and End Mill Included
- Compatible with Glock® 26/27 Gen3 Components
- Slide Lock Spring
- Patent Available
Details About LPK:
- Locking Block Pin
- Trigger Pin
- Magazine Catch
- Magazine Catch Spring
- Slide Stop Lever
- Slide Lock
- Trigger Spring
- Trigger Housing with Ejector
- Trigger with Trigger Bar
- 5.5lbs Connector
Details About SPK:
- Machined 17-4 stainless steel firing pin, standard weight and length
- Standard OEM specification extractor
- Firing Pin Spring, standard weight
- Firing Pin Spacer Sleeve
- 2 Spring Cups
- Machined 17-4 stainless steel extractor depressor plunger assembly
- Cover Plate
- Machined 17-4 stainless steel firing pin safety
- Firing Pin Safety Spring
- Channel Liner
Details About the Barrels:
- Available in RAW Stainless Steel (SS) or Black Nitride Finished
- Available in either Standard Cut or Threaded Barrel
- Threaded barrel will come with a Free Threaded Protector in either Black or SS Finish
- Black Nitride are 4150 Chrome Moly Vanadium .40S&W with 1:16 Twist
- SS are 416R Stainless Steel .40SW with 1:16 Twist.
- Glock Gen. 1-4 Compatible
- Made in the USA
*Our G27 Barrels are cut down G23 SS barrels. This is why you will see the original G23 Caliber Markings on the Top of the barrel lug.
*Barrel might require some fitting.
Details About the Slides:
- Machined from USA Grade 416R Stainless Steel Stock
- Front Serration
- Compatible with Glock Gen 1-3 OEM
- Cerakote Finish - Available in Black/Burnt Bronze/FDE/Tungsten Gray
- Made in USA
Ejector Upgrades: Upgrade Your standard style Ejector with either #30274 Gen.4 Ejector or Gen5 G19x #47021 for better ejection pattern. No more brass in the face! - Dealers Choice!
Check our How To Video Section for guide and tricks about your build:
MDX Arms does not sell firearms. This is not a firearm and will ship directly to you without FFL needed
We do not ship 80% to New Jersey
Please refer to your state and federal laws about 80% kits. It's your responsibility to know your own laws.
We're not responsible for any improper milling, installation of parts, damage or any injury that might occur. Make sure to use proper safety equipment during your build
“GLOCK” is a federally registered trademark of Glock, Inc. and is one of many trademarks owned by Glock, Inc. or Glock Ges.m.b.H. MDX Arms is not affiliated with nor endorsed by Glock, Inc. or Glock Ges.m.b.H.
5 Reviews Hide Reviews Show Reviews
I am grateful for the product i received.... And glad enough i was forewarned about the lower parts unavailability. Regardless, comunication was established and professionally executed. Thank you MDX and your professional associates.
Excellent materials, excellent look. Super tight fitting slide, it will take some time to break-in. Will purchase another soon.
Yea I wish I would’ve got the item I ordered but they’ve been helpful
Customer service was great in working with us. Product is of excellent quality and performs exactly as expected.
I read complaints about the G27 having slide issues. FYI: Its the front and rear drop in rails mainly the front! They both need material shaved off. Thats it! Other then that sweet build wish it had came with a mag other then that good customer service guys thx mdx. Hope the info helps out.