TBRM BBs are manufactured in Taiwan and are available in both standard precision grade (for indoor) and biodegradable variants, with a strict tolerance of 5.95mm ± 0.01mm. They come in a range of weights from 0.20g up to 0.40g and are marketed as “Best Performance” BBs with precision-grade plastic or biodegradable construction, depending on the model. Notably, TBRM BBs undergo a second grinding process and are made with an infused composite mineral material to enhance hardness and durability.

Performance and Build Quality:

• The precision tolerance (5.95mm ± 0.01mm) is on par with premium brands such as Tokyo Marui, G&G, KWA and Elite Force, which suggests good consistency in size and roundness.

• The use of composite mineral material and the additional grinding process indicate a focus on producing a hard, durable, and truly spherical BB, minimizing the risk of jams and improving accuracy. This was tested using a vernier caliper on multiple BB’s which were all perfectly round with no deformities.

• The internal structure was consistent after breaking several BB’s in half with wire cutters to check internal composition I found no abnormalities such as gaps/air pockets or foreign debris (in the past I have found a magnetic material inside a BB by another brand.

• The weight tolerance after testing 10 random BB’s was ±0.003g putting them on the same level as Tokyo Marui’s Finest.

When I tested these BBs at the shooting range, I immediately noticed they felt more stable and accurate compared to the BBs I usually use. I even asked some friends, who were with me, to give them a try, and they pretty much agreed with my impression.

The 0.25g BBs seem to be a perfect match for the power output of Japanese airsoft guns. Their flatter trajectory makes them ideal for outdoor airsoft games, where accuracy really matters.

I also had a few teammates try them out during a game, and their feedback was interesting. One said, “They’re as good as, if not better than, Marui. Irregular trajectories are much less noticeable!” Another teammate, however, said, “I can’t really tell the difference…”

Overall, these BBs seem to offer excellent performance, especially for players looking for consistency and accuracy in outdoor settings.