The Atlas BT15 3.35 Inch Picatinny Rail, part number BT15 from B&T Industries, is a flush cup MIL-STD-1913 rail with a radiused back, 3.35 inches (85 mm) long. It accommodates stock hole patterns with a centre-to-centre spacing of 1.76 to 2.78 inches (45–71 mm), and is the classic way to add bipod and monopod rail mounting to a conventional stock.
How It Compares
The radiused back is what suits the BT15 to a rounded forend; the Atlas BT17 4 inch flat-back Picatinny rail is the flat-bottomed equivalent and covers a wider hole spacing. For shorter stocks, the Atlas BT34 2.05 inch radius-back rail and the slotted Atlas BT49 2.05 inch adjustable rail cover tighter spacings. Fixings are the BT1517 rail mounting fastener set. More options in our bipod accessories.
Ideal For
- Conventional wooden and synthetic stalking stocks with a rounded forend
- Adding Picatinny mounting for an Atlas bipod to a rifle that has none
- Target and F-Class rifles being converted to rail-mounted support
- Stocks with existing holes spaced 1.76 to 2.78 inches (45–71 mm) apart
Key Features
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Type: MIL-STD-1913 Picatinny rail with flush cups, radius back
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Length: 3.35 inches (85 mm)
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Hole spacing: 1.76 to 2.78 inches (45–71 mm) centre-to-centre, approximate
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Back profile: Radiused, for rounded forends
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Fixings: The BT1517 fastener set covers both the BT15 and BT17
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Origin: Genuine B&T Industries, LLC — Made in USA
Technical Specifications
| Type |
1913 Picatinny rail, flush cup, radius back |
| Length |
3.35 inches (85 mm) |
| Hole Spacing |
1.76 to 2.78 inches (45–71 mm) centre-to-centre approx. |
| Fixings |
BT1517 rail mounting fastener set (sold separately) |
| Brand |
B&T Industries, LLC — Made in USA |
| SKU / MPN / UPC |
BT15 / BT15 / 810040220234 |
What's Included
- 1× Atlas BT15 3.35 inch (85 mm) Picatinny rail
Warranty
Supplied as genuine B&T Industries stock and covered by the manufacturer's warranty — contact our UK team and we will handle any claim on your behalf.
UK Delivery & Support
This Atlas rail is dispatched tracked from our UK warehouse — no import duties and no customs delays — and is backed by UK-based aftersales support.
Frequently Asked Questions
What hole spacing does the Atlas BT15 rail suit?
The BT15 accommodates stock hole patterns with a centre-to-centre spacing of approximately 1.76 to 2.78 inches (45–71 mm).
What is the difference between the Atlas BT15 and the BT17?
The BT15 is 3.35 inches (85 mm) long with a radiused back for rounded forends, while the BT17 is 4 inches (102 mm) long with a flat back for flat-bottomed forends and covers a wider hole spacing of 2.2 to 3.5 inches (56–89 mm).
Which bipods will mount to the Atlas BT15 rail?
Any bipod or monopod with a MIL-STD-1913 Picatinny interface will mount to it, including two-screw and ADM lever Atlas bipods and the Accu-Shot Precision Rail Monopods.
Are the mounting screws included with the Atlas BT15?
The fixings are sold separately as the BT1517 rail mounting fastener set, which contains two 10-32 T-nuts and two 10-32 × ¾ inch (19 mm) button head screws and covers both the BT15 and BT17.
What is in the box?
The box contains one Atlas BT15 3.35 inch (85 mm) flush cup Picatinny rail.
