Glock 19 Gen3 vs Gen5
What changed between the two most common generations of the Glock 19, and which one fits a Texas buyer.
The Glock 19 is the compact 9mm that most of this catalogue is built around. You will find it listed as Gen3, Gen4 and Gen5. Gen3 is the long running production standard. Gen5 is the current production line that Glock ships from Smyrna, GA. This page uses Glock's own published technical data for the G19 and G19 Gen5 from us.glock.com.
At a glance
| Feature | Gen3 G19 | Gen5 G19 |
|---|---|---|
| Finger grooves | Yes, molded into frame | No, flat front strap |
| Backstraps | Fixed grip | Modular Backstrap System, 4 sizes |
| Magazine release | Right side only, small | Reversible, enlarged |
| Slide stop | Right side only | Ambidextrous |
| Magwell | Straight walls | Slightly flared for reloads |
| Barrel | Polygonal rifling, standard crown | Glock Marksman Barrel, recessed crown, tighter chamber |
| Finish | Tenifer based | nDLC, harder and more corrosion resistant |
| Front serrations | No | Yes |
| Locking block pin | Present | Removed, 2 pin frame |
| Recoil spring | Single spring | Dual recoil spring assembly |
| Magazine follower | Black | Orange high visibility |
| Trigger mechanism | Standard housing | Revised housing, thicker striker, teardrop firing pin channel, coil spring in takedown lever |
Technical data from Glock
Both pistols share the same core numbers, taken from us.glock.com:
| Spec | G19 Gen3 / Gen5 |
|---|---|
| Caliber | 9x19mm |
| System | Safe Action |
| Standard capacity | 15, optional 17 / 19 / 24 / 31 / 33 |
| Barrel length | 102 mm | 4.02 inch |
| Overall length | Gen3 187 mm | 7.36 inch, Gen5 185 mm | 7.28 inch |
| Slide length | 174 mm | 6.85 inch |
| Width overall | Gen3 32 mm | 1.26 inch, Gen5 34 mm | 1.34 inch |
| Height incl mag | 128 mm | 5.04 inch |
| Weight without mag | Gen3 600 g | 21.16 oz, Gen5 610 g | 21.52 oz |
| Weight with empty mag | Gen5 670 g | 23.63 oz |
| Weight with loaded mag | Gen5 855 g | 30.16 oz |
| Trigger pull | ~26 N | ~5.5 lb |
Weights are from Glock published data. Loaded weight depends on ammunition. Technical data are rounded and may be altered without notice per Glock.
How they shoot differently
Marksman Barrel: Gen5 uses conventional rifling with a recessed crown instead of the older polygonal profile. Glock lists it as improved accuracy and more flexibility with bullet types.
Flared magwell and front serrations: The flare helps guide a magazine in. Front serrations give a forward press check option. Gen3 has neither.
Controls: Ambi slide stop and reversible release make Gen5 usable left handed without parts. Gen3 requires a right hand release.
Recoil: Gen5 dual spring was first introduced in Gen4. It spreads recoil over a longer stroke. Gen3 single spring is harsher on .40, but in 9mm the difference is modest.
Which one should you pick in Texas
Choose Gen3 if: you want maximum aftermarket support, you need California compliance history, or you found a used listing at a lower price. This catalogue has used Glock pistols in a separate collection. Gen3 parts are everywhere.
Choose Gen5 if: you are buying new, you want the current nDLC finish for sweat and humidity, you want front serrations and an optic ready MOS option, or you shoot left handed. For a new buyer in Texas, Gen5 is the simpler recommendation because it is what Glock currently produces and warranties from Smyrna.
Texas adds no extra restriction on either generation. Both transfer the same way: ship to your dropoff location where the licensed dealer completes ATF Form 4473, run FBI NICS, release on proceed. No state permit, no waiting period.
Where to find them here
- Glock 19 for sale - all generations, 26 listings
- Gen 6 Glocks - latest generation
- Optic ready Glocks - MOS cuts, mostly Gen5
- Used Glock pistols - often Gen3 and Gen4
- Compliance and eligibility - age 21 for handgun from a dealer, 18 for long gun
GLOCK is a registered trademark of GLOCK Ges.m.b.H. This page compares manufacturer published data and does not claim affiliation. Specs from us.glock.com/en/products/law-enforcement/pistols/g19-gen5 and us.glock.com/en/products/law-enforcement/pistols/g19, retrieved September 2026.