Milwaukee
M18 FUEL SAWZALL Reciprocating Saw 2821-20
$249
Released 2020-11
Best Reciprocating Saws · head-to-head
M18 FUEL SAWZALL Reciprocating Saw 2821-20 vs 18V Compact Reciprocating Saw GSA18V-083B
A sourced, side-by-side comparison. 18V Compact Reciprocating Saw GSA18V-083B is cheaper at $139. Every spec and price links to its source.
Bosch
18V Compact Reciprocating Saw GSA18V-083B
$139Cheaper
Released 2016
Which is better: the M18 FUEL SAWZALL Reciprocating Saw 2821-20 or 18V Compact Reciprocating Saw GSA18V-083B?
The 18V Compact Reciprocating Saw GSA18V-083B wins 1 of the 1 specs we compare head to head; the other wins 0. The 18V Compact Reciprocating Saw GSA18V-083B is the cheaper at $139. The 18V Compact Reciprocating Saw GSA18V-083B both leads on specs and costs less — the straightforward pick.
See M18 FUEL SAWZALL Reciprocating Saw 2821-20 on Amazon See 18V Compact Reciprocating Saw GSA18V-083B on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | M18 FUEL SAWZALL Reciprocating Saw 2821-20 | 18V Compact Reciprocating Saw GSA18V-083B |
|---|---|---|
| US price | $249 | $139 |
| Brand | Milwaukee | Bosch |
| Released | 2020-11 | 2016 |
| Power source | cordless | cordless |
| Amps or voltage | 18 V | 18 V |
| Strokes per min max | 3000 | 3050 |
| Stroke length (in) | 1.25 in | 0.83 in |
| Orbital action | No | No |
| Tool less blade change | Yes | Yes |
| Brushless | Yes | No |
| Weight (lb) | 6.8 | 4.4 |
| Release | 2020 | 2016 |
Sources — M18 FUEL SAWZALL Reciprocating Saw 2821-20: milwaukeetool.com (verified 2026-06-20). 18V Compact Reciprocating Saw GSA18V-083B: boschtools.com (verified 2026-06-20).
What's the difference between the M18 FUEL SAWZALL Reciprocating Saw 2821-20 and 18V Compact Reciprocating Saw GSA18V-083B?
Where the two actually differ on the specs we track (4 of 8). Matching specs are omitted.
- Strokes per min max: M18 FUEL SAWZALL Reciprocating Saw 2821-20 3000 vs 18V Compact Reciprocating Saw GSA18V-083B 3050
- Stroke length (in): M18 FUEL SAWZALL Reciprocating Saw 2821-20 1.25 in vs 18V Compact Reciprocating Saw GSA18V-083B 0.83 in
- Brushless: M18 FUEL SAWZALL Reciprocating Saw 2821-20 true vs 18V Compact Reciprocating Saw GSA18V-083B false
- Weight (lb): M18 FUEL SAWZALL Reciprocating Saw 2821-20 6.8 vs 18V Compact Reciprocating Saw GSA18V-083B 4.4