Hammer Strength Ground Base Jammer

Hammer Strength Ground Base Jammer

Built for raw power and explosive performance, the Hammer Strength Ground Base® Jammer is the real deal—no imitations, no compromises. While racks try (and fail) to mimic its movement, only the Jammer delivers the perfect blend of converging and diverging motion, unlocking true athletic drive.

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Hammer Strength Ground Base Jammer Reviews

Based on 7 reviews from Gym Radar users, the Hammer Strength Hammer Strength Ground Base Jammer have an average rating of 4.05 out of 5. They're currently the #30 most-owned Press Machine on Gym Radar, with 1 home gyms reporting ownership.

7 Reviews

4.05 / 5
Performance
3.86 / 5
Build Quality
4.71 / 5
Value
3.57 / 5

User Reviews

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5uperMan
Field Of Dreamz Gym
241 reviews
2437 points
(4.33)
6/2/2026
Found this on marketplace it took up a lot of room it just looked really good in my gym.
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Basement Brandon
Basement Barbell
500 reviews
4294 points
(3.00)
3/30/2026
Great build quality like all things in this brand/price range, but my gym had one of these and I could never find a use for it in training.
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Big WillyXXXL
Willett Stronghaus
38 reviews
564 points
(5.00)
3/27/2026
I used this for quite a few years while playing football. It took a little bit to get used to the motion at first, but once you did, it was a great wait to built explosiveness and strength. I don't think this is something a bodybuilder/powerlifter/strongman would use, but it's definitely a great tool for athletes. It takes up a large footprint so it isn't ideal for smaller or limited spaces.
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Brandon Tunquist
Tunquist's Gym
776 reviews
5204 points
(2.67)
3/27/2026
Kind of a pointless machine these days that takes up unnecessary room in a gym when they make jammer arms to a power rack where you can do stuff like this. I think the crowd that would mostly use it is athletes anyways and not your average gym goers
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ATP Gym
ATP Gym
581 reviews
4074 points
(3.33)
3/27/2026
Was never a big fan of this piece, made for building explosiveness but if you were to strong / explosive it would move around a good amount
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Hayden Lovelady
Misfits Barbell Club
144 reviews
1328 points
(5.00)
2/27/2026
Great piece for training athletes and you can find them pretty cheap on marketplace. I don't use them in my training however, it is great to build explosive power in athletes.
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The Barn Barbell
The Barn Barbell's Gym
290 reviews
2402 points
(5.00)
2/27/2026
I’m nostalgic for this piece as I used the hell out of one in HS for football workouts and found a lot of versatility could be built into the piece. This is not one to buy if you have a limited or tight floor space, or lack the unexplainable passion I have for it. They come up CHEAP on secondary market with my piece being a $200 FB marketplace find and I’ve since seen 20-30 for 150-400. Can be used as a poor man’s Viking press though grip is very narrow, but with a bench dropped in it’s a nice incline press motion as well.
Performance
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