HGW Complete Upper for Glock 21 Gen3, Titan Duty RMR Stainless Slide, 45 ACP Fluted Stainless Barrel


Out of stock

SKU: A-21006-TITAN-DUTY-RMR-SS-F-PKT-SS Categories: , ,


HGW Complete Upper for Glock 21 Gen 3, .45 ACP Barrel.  For install on Glock 21 lower.
A Hooper Gun Works Exclusive!  An upper perfectly styled for showing off at the range.  Ready for your sights.

Always ask what’s in your Glock Upper, here’s our kit fully detailed:

HGW Titan Duty Optic Cut Slide (made in the USA):

  • Gen 1-3 compatible, G21, 45 ACP
  • CNC Machined from U.S. 17-4 stainless steel
    • 17-4 steel is far more resilient to impact forces than 416ss, both are good, 17-4 is the best out there.
  • Fine Bead Blast Satin Finish
  • RMR Optic Cut – Trijicon footprint.  Also compatible with Trijicon SRO, Holosun 407C/507C/508T, Swampfox Kingslayer/Liberty/Justice
  • Includes patented optic cut technology pioneered by ZEV Tech.
  • 0.180″ RMR depth of cut, fully threaded posts using 4-40 screws.  Forward locating tabs for the most secure optic retention.
    • These RMR features also allow for the most repeatable mounting of optics, maintaining boresighting and cowitnessing.  Designed to hold this true under hard use.
  • The highest level of attention to machining and finishing detail of all of our product lines
  • Heat Treated
  • Slanted front and rear serrations
  • Custom “sculpted-design” nose, inspired by our shop’s love for classic cars and trucks.
  • Deep chamfered edge, fantastic for lightweight EDC builds
  • Excellent edge machining quality. Again, the finest out there.

HGW Barrel (made in the USA):

  • CNC Machined from 416 Stainless Steel
  • Match Grade
  • Fluted and Pocketed design
  • Standard Length
  • Heat Treated
  • Laser engraved on the hidden side with model and caliber in sharp, easy to read contrast

Pre-installed HGW aftermarket internals (made in the USA):

    • Machined SS non-captive guide rod (Wolff Style) adds weight to the front end
      • Gen 1-3 compatible, G21, .45 ACP
      • CNC Machined from U.S. 416 stainless steel
      • Heat Treated
      • Round Wire Recoil Spring,  OEM weight
      • Take down hole which is an added bonus over the Wolff design
  • Striker / Firing Pin – Machined
  • Channel Liner
  • Striker Spacer Sleeve
  • Striker / Firing Pin Spring cups
  • Firing Pin Safety
  • Extractor
  • Extractor Depressor Plunger
  • Spring Load LCI Bearing
  • Internal Spring Kit
    • Striker, Extractor & FPS in Factory Weights
  • Backplate

You are purchasing a complete upper built by military veterans. All internal parts are included. Fitting may be required.
A fantastic deal on a complete match grade package offered at Rock Bottom Pricing!

Additional information

Weight 26 oz



For Gun Make

For Gun Model



.45 ACP

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Specific Part



Country/Region of Manufacture


Optic Cut – Trijicon RMR

Patent RE47335

Includes patented optic cut technology pioneered by ZEV Tech.