The Atlas BT33 Tube Rail Kit, part number BT33 from B&T Industries, puts a 2.05 inch (52 mm) MIL-STD-1913 Picatinny rail on a free float tube. The kit contains the rail, a nut plate and two screws, which is everything needed for tube mounting.
How It Compares
The BT33 is the free float tube version of the same 2.05 inch (52 mm) rail sold on its own as the Atlas BT34 2.05 inch 1913 rail; the difference is the nut plate that lets it clamp to a tube rather than bolt into stock holes. For M-LOK handguards the equivalent is the Atlas BT73 M-LOK Picatinny rail. Bipods to go on it are in our Atlas bipod range.
Ideal For
- Free float tube handguards with no existing rail
- Practical and service rifle builds and AR-pattern rifles
- Target and F-Class rifles with tube forends
- Adding Atlas bipod mounting without drilling the stock
Key Features
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Type: Tube rail kit with 1913 Picatinny rail
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Rail length: 2.05 inches (52 mm)
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Fits: Free float tubes
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Contents: Rail, nut plate and two screws
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Takes: Two-screw and ADM lever-mount Atlas bipods, and Picatinny monopods
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Origin: Genuine B&T Industries, LLC — Made in USA
Technical Specifications
| Type |
Tube rail kit, 1913 Picatinny |
| Rail Length |
2.05 inches (52 mm) |
| Fits |
Free float tubes |
| Contents |
1× rail, 1× nut plate, 2× screws |
| Brand |
B&T Industries, LLC — Made in USA |
| SKU / MPN / UPC |
BT33 / BT33 / 810040220319 |
What's Included
- 1× 2.05 inch (52 mm) 1913 rail
- 1× nut plate
- 2× screws
UK Delivery & Support
This Atlas rail kit is imported from the USA, duty paid by us, and dispatched tracked from the UK — nothing to pay on delivery — and is backed by UK-based aftersales support.
Frequently Asked Questions
What does the Atlas BT33 tube rail kit do?
The BT33 mounts a 2.05 inch (52 mm) MIL-STD-1913 Picatinny rail onto a free float tube, so a Picatinny-mount bipod or monopod can be fitted to a tube handguard.
What is included in the Atlas BT33 kit?
The BT33 kit contains the 2.05 inch (52 mm) rail, a nut plate and two screws.
How is the BT33 different from the BT34 rail?
Both use a 2.05 inch (52 mm) rail, and the BT33 adds the nut plate and screws needed to clamp it to a free float tube, whereas the BT34 bolts into existing stock holes.
Which bipods will mount to the Atlas BT33?
Any bipod with a standard MIL-STD-1913 Picatinny clamp will fit, including the two-screw and ADM lever Atlas models.
What is in the box?
The box contains one 2.05 inch (52 mm) 1913 rail, one nut plate and two screws.
