The BCM 3 inch Picatinny Rail Section is an aluminum MIL-STD-1913 rail ladder for AR-15 and M4 rifles, bolting directly to any M-LOK handguard.
M-LOK handguards are lighter and slimmer than quad rails precisely because they carry no rail they are not using. The cost of that is any accessory built for a Picatinny interface — a vertical grip, a light mount, a bipod adapter, an offset optic — has nothing to clamp to. This section solves it in one part: it fastens through the M-LOK slots and presents three inches of hard-anodized aircraft aluminum alloy machined to Mil-Standard 1913 Picatinny Arsenal specification.
The profile is deliberately snag-resistant, so it does not become the thing that catches on a sling or a bag every time the rifle moves. Mounting hardware and a hex key are supplied, so nothing else is needed to fit it.
Key Features
- True MIL-STD-1913 geometry — Picatinny accessories clamp and index as intended
- Hard-anodized aluminum — hard-wearing without the weight of steel
- Direct M-LOK attachment — no intermediate adapter plate
- Snag-resistant profile — shaped so it does not foul gear
- Hardware and hex key included — fit it the day it arrives
Compatibility & Fitment
Fits any M-LOK handguard or forend with the slot spacing to take a 3 inch section, on AR-15/M4 rifles. It is an M-LOK part, so it will not attach to a KeyMod handguard or to an existing Picatinny rail. Once fitted it accepts any accessory built for a 1913 Picatinny interface. Position it before you tighten down — a section too far forward puts a light or grip where the support hand is not — then torque the fasteners with the supplied hex key and re-check them after the first session.
Technical Specifications
Platform | AR-15 / M4 |
Fits | M-LOK handguards and forends |
Type | Picatinny rail section, MIL-STD-1913 |
Material | Aircraft aluminum alloy |
Finish | Hard anodized |
Length | 3 in (76 mm) |
Mount Interface | M-LOK, mounting hardware and hex key included |
Brand | Bravo Company USA |
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Will this fit a KeyMod handguard?
No. This is the M-LOK version and its fasteners engage M-LOK slots. KeyMod handguards need a KeyMod rail section instead. Check which system your handguard uses before ordering — M-LOK slots are plain rectangles, KeyMod slots have a round keyhole at one end.
What can I mount on it once it is fitted?
Anything built for a 1913 Picatinny interface: vertical and angled foregrips, light mounts, bipod adapters, offset optic mounts, sling mounts and so on. That is the point of the part — it converts a section of M-LOK into the interface most accessories are still made for.
Is any hardware included?
Yes. The mounting hardware and a hex key are supplied, so no separate purchase is needed. Torque the fasteners evenly and re-check them after the first range session, as with any rail-mounted hardware.
