Glock Model 21
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| Action: | Semiautomatic | |
| Caliber: | .45 ACP | |
| Length: | 7.59 in. | |
| Height including magazine: | 5.47 in. | |
| Width: | 1.27 in. | |
| Length between sights: | 6.77 in. | |
| Barrel length: | 4.60 in. | |
| Barrel profile: | Octagonal profile w/ right hand twist |
|
| Length of twist: | 15.75 in. | |
| Magazine capacity: | (Now)10+1 rounds (Was)13 rounds(Standard) | |
| Mass (weight): | 25.22 oz. (Without magazine) | |
| Muzzle velocity *: | ~820 fps | |
| Muzzle energy *: | ~302 Ft. Lbs. | |
| Trigger pull: | ~5-8 lbs. | |
| Trigger Slack travel (taking up tension and releasing safety): |
0.2 in. | |
| Trigger travel to discharge: | 0.5 in. |
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