Glock G21 Gen5 MOS .45 ACP vs Sig Sauer P320 Full Size .45 ACP
Glock G21 Gen5 MOS .45 ACP
Glock
Sig Sauer P320 Full Size .45 ACP
Sig Sauer
Specifications Comparison
| Specification | Gen5 | P320 |
|---|---|---|
| Caliber | .45 ACP | .45 ACP |
| Capacity | 13 | 10 |
| Barrel Length | 4.61" | 4.7" |
| Overall Length | 8.07" | 8.0" |
| Height | 5.51" | 5.5" |
| Width | 1.38" | 1.3" |
| Weight | 29.1 oz | 29.5 oz |
| Trigger Pull | 5.5 lbs | 6.5 lbs |
| Sight Radius | — | — |
| Action | Striker Fired | Striker Fired |
| MSRP | $700.00 | $679.00 |
Caliber
Glock
.45 ACP
Sig Sauer
.45 ACP
Capacity
Glock
13
Sig Sauer
10
Barrel Length
Glock
4.61"
Sig Sauer
4.7"
Overall Length
Glock
8.07"
Sig Sauer
8.0"
Height
Glock
5.51"
Sig Sauer
5.5"
Width
Glock
1.38"
Sig Sauer
1.3"
Weight
Glock
29.1 oz
Sig Sauer
29.5 oz
Trigger Pull
Glock
5.5 lbs
Sig Sauer
6.5 lbs
Sight Radius
Glock
—
Sig Sauer
—
Action
Glock
Striker Fired
Sig Sauer
Striker Fired
MSRP
Glock
$700.00
Sig Sauer
$679.00
Glock G21 Gen5 MOS .45 ACP vs Sig Sauer P320 Full Size .45 ACP: Which to Buy
Both are full-size .45 ACPs at similar dimensions and weight. The Glock G21 Gen5 MOS carries three more rounds (13+1 vs 10+1), breaks 1.0 lb lighter at the trigger (5.5 lb vs 6.5 lb), and ships optic-ready out of the MOS box. The P320 Full Size in .45 ACP does not include a factory optic cut at this configuration. Length, height, width, and weight are within thresholds, so these guns carry the same way.
Pick the Glock G21 Gen5 MOS if:
- You want 13+1 capacity — three more rounds than the P320 in .45 ACP
- You want a 1 lb lighter factory trigger pull and the MOS optic cut included
- You want the Glock aftermarket for parts, holsters, and magazines
Pick the Sig Sauer P320 Full Size .45 ACP if:
- You want the serialized modular FCU that swaps between grip modules across calibers
- You prefer the P320 grip geometry over Glock's blockier frame
Both are full-size striker-fired .45 ACPs at the same overall dimensions and weight. The Glock wins on capacity and the trigger; the Sig wins on FCU modularity.
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Stock Up On .45 ACP Ammo for the Range
| PRODUCT | DEALER | QUANTITY | PRICE | SHIPPING | TOTAL PRICE | PRICE/RD |
|---|---|---|---|---|---|---|
| Sentry Ammo | 1000 | $353.42 | $26.55 | $379.97 |
$0.38
1000 Rounds
|
|
| Ammo Hero | 1000 | $385.17 | $0.00 | $385.17 |
$0.39
1000 Rounds
|
|
| Sentry Ammo | 500 | $198.80 | $9.99 | $208.79 |
$0.42
500 Rounds
|
|
| Bulk Munitions | 1000 | $409.00 | $31.41 | $440.41 |
$0.44
1000 Rounds
|
|
| Bulk Munitions | 1000 | $419.00 | $31.10 | $450.10 |
$0.45
1000 Rounds
|
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