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Ships within 48 hours · Estimated delivery Jul 1 - Jul 6
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Description
p4s gear Retro ARMS PandoRA 20:1 Gears, 4mm Axle – BRILL ARMORYFully CNC machined gears from high quality hardened steel. Made in the Czech Republic. These gears will yield a slightly lower rate of fire and higher torque when upgrading from the standard 18: 1 gears found in many gearboxes. For enhanced feeding with a high rate of fire, consider incorporating the Retro ARMS 4mm POM Delayer Clip. The 4mm axle has theoretical advantages, such as increased durability and improved force distribution. The 4mm Axle is
Fully CNC machined gears from high quality hardened steel. Made in the Czech Republic.These gears will yield a slightly lower rate of fire and higher torque when upgrading from the standard 18:1 gears found in many gearboxes. For enhanced feeding with a high rate of fire, consider incorporating the Retro ARMS 4mm POM Delayer Clip.
The 4mm axle has theoretical advantages, such as increased durability and improved force distribution.
The 4mm Axle is not compatible with common 3mm shims, bushings, and bearings. Specialized 4mm shims, bushings, or bearings will be required for installation.
4mm gear products available here (opens in new window.)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 1688 reviews
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Product Reviews
★★★★★ 4
THE BEST TEETHING WHITENING EVER
These really do work! I had done these for three day and there a big different already. I suggest to buy this product and I think it’s worth your money. I will say though to be careful because they make your gums sensitive and can give your gums burn if you’re not careful. If you notice any burning of the gums please take a break so you don’t further damage your gums. Other than that this product is only teeth whitening treatment that didn’t put weird white patches on my teeth. So if you’re struggling with that, I suggest you buy these.
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Reviewed in the United States on June 3, 2026
★★★★★ 5
Popular for good reason!
All it took were 2 sessions before I noticed a brighter, whiter difference! They stayed on fine for the most part although for some reason the bottom strips wouldn't stick to the backs of my lower incisors as well. Also no issue with discomfort or sensitivity
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
★★★★★ 5
😁
I've been using them for 10 or more years. They do exactly as promised. Beautiful white teeth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
★★★★★ 5
Works!
Theses strips work great and they are non-irritating!
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Reviewed in the United States on June 3, 2026
★★★★★ 3
Meh results
These sort of work….. but are a lot of work for me to use. morning and night. There just is NOT enough bang for my buck and also the whitening power misses BETWEEN my teeth so I feel gel in a tray is the next option or a one time whitening session from my dentist which includes trays and gel for later touching up!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
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