For playing in office, I would also agree with Zeroglyph on the strongarm, not too big and not too small. But I still prefer jolt for office use, small, not too conspicuous, and no need lot of dart.

But if you like sniper kinda blaster, how about retaliator? Can put on the barrel and stock for nice rifle appearance or take both out for smaller blaster.

also, consider hammershot, if you can get it lower than retails. retails price is ridiculous, unless you absolutely have to have it.

stryfe is good too, but lack range and uses clip. slam fire > flywheel when i comes to office war  .

How much you bought the retaliator?

BTW, those upgrade kit is a waste of money imo.

yup, way too expensive. there are some 3rd party attachments in mudah, but those have hefty prices too, due to not being mass produced.

Cheaper attachment alternative,  3d printed.

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Actually there is a great 3rd party replacement modification kits call WORKER for Nerf blaster.
Can have a try search and found at TaoBao sure cheaper.

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Here some review of the WORKER mod kit below.