Convoy M21B vs SureFire G2X Pro size comparison
The SureFire G2X Pro is 9.4 mm (0.37 in) shorter than the Convoy M21B, and 4 mm narrower at its widest point. Weights are published on different bases (with batteries vs listed), so compare them with care.
The SureFire G2X Pro is 9.4 mm (0.37 in) shorter than the Convoy M21B, and 4 mm narrower at its widest point. Weights are published on different bases (with batteries vs listed), so compare them with care.
Dimensions
| Convoy M21B Check price ↗ | SureFire G2X Pro Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 132.1 mm (5.20 in)−9.4 mm |
| Head / width | 35.7 mm (1.41 in) | 31.8 mm (1.25 in)−4 mm |
| Body | 27.1 mm (1.07 in) | 25.4 mm (1.00 in)−1.7 mm |
| Weight | 120 g listed | 124.7 g with batteries |
| Battery | 21700 | 2x CR123A |
| Max output | — | 600 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | $99.00 at batteryjunction.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | batteryjunction.com sourced |
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs G2X Pro: how they differ
Size and weight
The SureFire G2X Pro is the shorter light: 132.1 mm (5.20 in) against 141.5 mm (5.57 in), a difference of 9.4 mm (7%). At its widest point the SureFire G2X Pro is 4 mm slimmer (31.8 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; SureFire G2X Pro: 124.7 g with batteries), so they are not directly comparable.
Brightness and throw
The SureFire G2X Pro is rated at 600 lm; we have no published maximum for the Convoy M21B. Output for the Convoy M21B depends on the LED option chosen.
Battery
The Convoy M21B runs on a removable 21700 battery; the SureFire G2X Pro runs on removable 2x CR123A batteries. For scale, a 21700 cell is about 21 × 70 mm and a CR123A about 17 × 34.5 mm (nominal).
Price
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the SureFire G2X Pro $99.00 at batteryjunction.com, so the Convoy M21B cost $50.01 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the SureFire G2X Pro if you want a shorter light (9.4 mm shorter) and a slimmer profile (4 mm narrower). On the specs we track, the SureFire G2X Pro is ahead or level everywhere; the Convoy M21B makes sense mainly if its price, interface or a feature we don't track suits you better. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Convoy M21B Check price ↗ SureFire G2X Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs G2X Pro FAQ
Which is smaller, the Convoy M21B or the SureFire G2X Pro?
The SureFire G2X Pro is the shorter light: 132.1 mm (5.20 in) against 141.5 mm (5.57 in), a difference of 9.4 mm (7%). At its widest point the SureFire G2X Pro is 4 mm slimmer (31.8 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; SureFire G2X Pro: 124.7 g with batteries), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the SureFire G2X Pro?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the SureFire G2X Pro $99.00 at batteryjunction.com, so the Convoy M21B cost $50.01 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and SureFire G2X Pro use the same battery?
The Convoy M21B runs on a removable 21700 battery; the SureFire G2X Pro runs on removable 2x CR123A batteries. For scale, a 21700 cell is about 21 × 70 mm and a CR123A about 17 × 34.5 mm (nominal).
Compare Convoy M21B with similar lights
Compare SureFire G2X Pro with similar lights
More
Sources
- Convoy M21B: specs from manufacturer published specs as listed by flashlightgo.com. Drawing: outline from published specs. Price $48.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
- SureFire G2X Pro: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. Price $99.00 from batteryjunction.com, checked Nov 4, 2026; prices change often.
Found an error? Email [email protected] and we will fix it.