The Atlas BT17 4 Inch 1913 Picatinny Rail, part number BT17 from B&T Industries, is a flush cup MIL-STD-1913 rail with a flat back, 4 inches (102 mm) long. It accommodates stock hole patterns with a centre-to-centre spacing of 2.2 to 3.5 inches (56–89 mm), giving bipod and monopod rail mounting on flat-bottomed forends.
How It Compares
The flat back is what separates the BT17 from the radiused Atlas BT15 3.35 inch Picatinny rail, which suits rounded forends and a tighter hole spacing. For short stocks, the Atlas BT34 2.05 inch radius-back rail and the slotted Atlas BT49 2.05 inch adjustable rail are the compact options. Fixings are the BT1517 rail mounting fastener set. See the rest in our bipod accessories.
Ideal For
- Target, F-Class and benchrest stocks with a flat-bottomed forend
- Adding Picatinny mounting for an Atlas bipod to a rifle that has none
- Stalking rifles being converted to rail-mounted support
- Stocks with existing holes spaced 2.2 to 3.5 inches (56–89 mm) apart
Key Features
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Type: MIL-STD-1913 Picatinny rail with flush cups, flat back
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Length: 4 inches (102 mm)
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Hole spacing: 2.2 to 3.5 inches (56–89 mm) centre-to-centre, approximate
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Back profile: Flat, for flat-bottomed 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, flat back |
| Length |
4 inches (102 mm) |
| Hole Spacing |
2.2 to 3.5 inches (56–89 mm) centre-to-centre approx. |
| Fixings |
BT1517 rail mounting fastener set (sold separately) |
| Brand |
B&T Industries, LLC — Made in USA |
| SKU / MPN / UPC |
BT17 / BT17 / 810040220241 |
What's Included
- 1× Atlas BT17 4 inch (102 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 BT17 rail suit?
The BT17 accommodates stock hole patterns with a centre-to-centre spacing of approximately 2.2 to 3.5 inches (56–89 mm).
What is the difference between the Atlas BT17 and the BT15?
The BT17 is 4 inches (102 mm) long with a flat back for flat-bottomed forends, while the BT15 is 3.35 inches (85 mm) long with a radiused back for rounded forends and a tighter hole spacing.
Which bipods will mount to the Atlas BT17 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 BT17?
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 fits both the BT15 and BT17.
What is in the box?
The box contains one Atlas BT17 4 inch (102 mm) flush cup Picatinny rail.
