| 17 | 9 x 19 mm | 17 | 4.49 in (114 mm) | fullsize 9 mm | 9×21 IMI | L,C,T | 1, 2, 3, RTF2, 4, M, 5, reissue, V, 6 | 17 | gen 4/5 option, gen 3 factory retrofit | | early gen 5 has moon w/o front slide serrations | 6.5 × 25 mm CBJ barrel, G22 .40 slide, G27 .357 slide, 22 LR slide | 22 (.40), 37 (.45 GAP) | 19, 19x, 45, 47 (gen 6 frame) | |
| 18 | 9 x 19 mm | 17 | 4.49 in (114 mm) | fullsize 9 mm machine pistol | | C (2,3) | 1?, 2, 3 | 17 | | | | 9×21 IMI & 6.5 × 25 mm CBJ barrel, G22 .40 slide, G27 .357 slide, 22 LR slide | | | needs source for gen 1 |
| 19 | 9 x 19 mm | 15 | 4.02 in (102 mm) | compact 9 mm | 9×21 IMI | C, T, X | 1, 2, 3, RTF2, 4, M, 5, V, 6 | 19 | 17 | (17 only for 19X) | gen 4/5 option, gen 3 factory retrofit | Yes | early gen 5 has moon w/o front slide serrations | 6.5 × 25 mm CBJ, G23 .40 slide, .22 LR slide | | | |
| 20 | 10 x 25 mm | 15 | 4.60 in (117 mm) | fullsize 10 mm | | C | 2, pre gen 3 “2.5”, 3, 4, 5, V | 20 | all gen 5/V | | 21 compatible frame | .45 ACP, .357 SIG, .40 S&W, .38 super, 9 x 23 Winchester, 9 x 25 Dillon, & .224 Boz barrels | | | |
| 21 | .45 ACP | 13 | 4.61 in (117 mm) | fullsize 45 ACP | | C, SF | 2, pre gen 3 “2.5”, 3, 4, 5, V | 21 | all gen 5/V | | 20 compatible frame | 10 x 25 mm, .40 super | | | |
| 22 | .40 S&W | 15 | 4.49 in (114 mm) | fullsize 40 | .357 SIG | C, SF | 2, 3, RTF2, 4, 5 | 22 | gen 5 option | | pre production single pin?, 17 gen 3+ frame compatible | .22 LR, 9 x 19 mm | | | factory support for conversions |
| 23 | .40 S&W | 13 | 4.02 in (102 mm) | compact 40 | .357 SIG | C | 2, 3, RTF2, 4, 5 , V | 23 | 22 | gen 5/V option | | 19 gen 3+ frame compatible | .22 LR, 9 x 19 mm | | | factory support for conversions |
| 24 | .40 S&W | 15 | 6.02 in (153 mm) | fullsize 40 w/ extended slide | .357 SIG | C | 2,3 | 22 | | | 22 & 17 gen 3+ frame comaptible | .22 LR, 9 x 19 mm | | | factory support for conversions |
| 25 | .380 | 15 | 4.02 in (102 mm) | compact .380 | | | 2?/2.5?,3 | 25 | | | | | | | on pre gen 3 types |
| 26 | 9 x 19 mm | 10 | 4.02 in (102 mm) | sub compact 9 mm (baby glock) | | | original baby Glock “2.5”, 3, 4, 5 ,V | 26 | 19 , 17 | gen 5/V option | | first duel spring guide rod , no rail ever, 2.5 smooth grooves, early gen 5 w/o front slide serrations | 6.5 × 25 mm CBJ, G27 .40 slide, .22 LR slide | | | |
| 27 | .40 S&W | 9 | 3.43 in (87 mm) | sub compact .40 (baby glock) | | | original baby Glock “2.5”, 3, 4, 5 | 27 | 23, 22 | | | 2.5 smooth grooves, no rail ever, all have duel guide rod | .22 LR, 9 x 19 mm | | | |
| 28 | .380 | 10 | 3.43 in (87 mm) | sub compact .380 (baby glock) | | | original baby Glock “2.5”?, 3 | 28 | | | no rail ever | | | | pre gen 3 types |
| 29 | 10 x 25 mm | 10 | 3.78 in (96 mm) | sub compact 10 mm (baby glock) | | SF | “original” baby Glock “2.5”, 3, 4 , 5 | 29 | 20 | | | 3, 4, 5 and some 3SF versions railed, all have duel guide rod | .357 SIG, 40 S&W, 9 x 23 Winchester, 9 x 25 Dillon, .224 Boz | | | on pre gen 3 types, guide rod |
| 30 | .45 ACP | 10 | 3.78 in (96 mm) | sub compact 45 (baby glock) | | SF, S | “original” baby Glock “2.5”, 3, 4, 5 | 30 | 21 | | | 3, 4, 5 and some 3SF versions railed, S version has 36 width/compatible slide, all have duel guide rod | 10 x 25 mm, .40 super | | | on pre gen 3 types, guide rod |
| 31 | .357 SIG | 15 | 4.49 in (114 mm) | fullsize 357 | | C | 2, 3, 4 | 31 | | | | .40 S&W, 9 x 19 mm | | | |
| 32 | .357 SIG | 13 | 4.02 in (102 mm) | compact 357 | | C | 2, 3, 4 | 32 | 31 | | | | .40 S&W, 9 x 19 mm | | | |
| 33 | .357 SIG | 9 | 3.43 in (87 mm) | sub compact 357 (baby glock) | | | “original” baby Glock “2.5”, 3, 4 | 33 | 32, 31 | | | 2.5 has smooth grooves, all have duel guide rod | .40 S&W, 9 x 19 mm | | | on pre gen types, guide rod |
| 34 | 9 x 19 mm | 17 | 5.32 in (135 mm) | fullsize 9 mm w/ slightly extended cut slide | 9 x 21 IMI | | 3, 4 , 5 | 17 | gen 4/5 option, gen 3 factory retrofit | | 17 compatible frame | .22 LR, 6.5 × 25 mm CBJ | | | |
| 35 | .40 S&W | 15 | 5.32 in (135 mm) | fullsize .40 w/ slightly extended cut slide | .357 SIG? | | 3, 4, 5 | 22 | gen 4 option, all gen 5 | | 17 compatible frame | .22 LR, 9 x 19 mm | | | factory support for conversions |
| 36 | .45 ACP | 6 | 3.78 in (96 mm) | slim sub compact 45 | | | 3 | 36 | | | same slide width as standard 9 mm (17, 19, 26) | 10 x 25 mm ? in theory | | | same locking block as 21, 30, 41? |
| 37 | .45 GAP | 10 | 4.49 in (114 mm) | .45 GAP fullsize | | | 3, 4 | 37 | | | 17 gen 3 & 4 compatible frames | .40 S&W barrel or all gen 3/4 17 compatible slides | | | |
| 38 | .45 GAP | 8 | 4.02 in (102 mm) | .45 GAP compact | | | 3 | 38 | 37 | | | 19 gen 3 compatible frame | all 19 compatible slides | | | same locking block as 37? |
| 39 | .45 GAP | 6 | 3.43 in (87 mm) | .45 GAP subcompact | | | 3 | 39 | 38, 37 | | | 26 gen 3 compatible frame | all 26 comaptible slides | | | same locking block as 37? |
| 40 | 10 x 25 mm | 15 | 6.02 in (153 mm) | fullsize 10 mm with extended slide | | | 4 | 20 | all (gen 4) | | | .45 ACP, .357 SIG, .40 S&W, .38 super, 9 x 23 Winchester, 9 x 25 Dillon, & .224 Boz barrels | | | |
| 41 | .45 ACP | 13 | 5.31 in (135 mm) | fullsize 45 w/ slimmed slightly extended slide | | | 4 | 21 | option for all (gen 4) | | 21 comaptible frame, 36/standard 9 mm width slide | 10 x 25 mm, .40 super | | | |
| 42 | .380 | 6 | 3.25 in (83 mm) | slimline sub compact 380 | | | slimline | 42 | | | | | | | |
| 43 | 9 x 19 mm | 6 | 3.39 in (86 mm) | slimline sub compact 9 mm | | X | slimline | 43 | (48 only for 43X) | option for 43X | 43X | | 6.5 × 25 mm CBJ | | | |
| 44 | .22 Long Rifle | 10 | 4.02 in (102 mm) | compact 22 | | | original Glock 44 “non V”, V | 44 | | | | | | | |
| 45 | 9 x 19 mm | 17 | 4.02 in (102 mm) | fullsize 9 mm w/ compact frame | | C | 5, V, 6 | 17 | gen 5 only option | Yes | 19 compatible slide, 47 compatible frame | .22 LR, 6.5 × 25 mm CBJ | | | |
| 46 | 9 x 19 mm | 17 | 4.49 in (114 mm) | fullsize 9 mm with rotating barrel | | | n/a | 17 | | | | 6.5 × 25 mm CBJ | | | |
| 47 | 9 x 19 mm | 17 | 4.49 in (114 mm) | fullsize 9 mm with compact recoil spring | | X | 5 | 17 | all (gen 5) | Yes | 45 compatible frame, X adds threaded barrel & 2 tone FDE | .22 LR, 6.5 × 25 mm CBJ | | | |
| 48 | 9 x 19 mm | 10 | 4.17 in (106 mm) | slimline compact 9 mm | | | slimline | 48 | option | Yes | | 6.5 × 25 mm CBJ | | | |
| 49 | 9 x 19 mm | 15 | 4.49 in (114 mm) | 9mm compact w/ fullsize barrel | | | 5, 6? | 19 | 17 | all (gen 5) | | 19 comaptible frame, 47 compatible slide | .22 LR, 6.5 × 25 mm CBJ | | | speculative for gen 6 |
