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MSR Guardian Purifier Pump vs MSR TrailShot

Weight and specs compared for 2026 — and which one to choose.

MSR TrailShot is the lighter option — 349 g lighter than the MSR Guardian Purifier Pump (71% less weight). If grams matter to you, that is the one to beat.
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Spec MSR Guardian Purifier Pump MSR TrailShot
Weight 490 g · 0.490 kg · 1.08 lb
as listed
 141 g · 0.141 kg · 0.31 lb
Brand MSR MSR
Category Hygiene Hygiene
MSR Guardian Purifier Pump
490 g

Military-grade water purifier removes viruses, bacteria and protozoa.

See it in your base weight → Full details →
MSR TrailShot
141 g

Pocket-sized squeezable water filter. Fast flow rate.

See it in your base weight → Full details →

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MSR Guardian Purifier Pump vs MSR TrailShot: which should you buy?

If saving weight is your priority, the MSR TrailShot wins — at 141 g it is 349 g (71%) lighter than the MSR Guardian Purifier Pump (490 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest hygiene page, or browse the full gear weight database.

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