Super Modular Mk16 SM Rail 9.3" M-LOK For AR-15 BLK
$300.00 at Brownells · 10 stores
In stock
AR-15/M16 Mk 4 Super Modular Rails, M-LOK - 9.3" Super Modular Rail Mk4 M-LOK BLK
Geissele Automatics · Rails & Handguards
No ratings yetFits and works with
- Handguard length
- 9.3" · Barrels
Specifications
- Manufacturer
- Geissele Automatics
Compatibility
- Inside diameter
- 1.35"
- Platform
- AR-15
Dimensions and weight
- Length
- 9.3"
Materials and features
- Attachment
- M-LOK, Picatinny
- Color
- Black
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price 17.76% off · ends Nov 15 · exclusions apply | $300.00checked Nov 14, 2026 | In stock | Buy at Brownells | |
| OpticsPlanet | $300.00Salechecked Nov 14, 2026 | In stock | Buy at OpticsPlanet | |
| Ammunition Depot | $300.00checked Nov 14, 2026 | In stock | Buy at Ammunition Depot | |
| GunMag Warehouse | $300.99checked Nov 14, 2026 | In stock | Buy at GunMag Warehouse | |
| Battlehawk Armory | $223.99checked Nov 14, 2026 | Check store | Buy at Battlehawk Armory | |
| GrabAGun | $250.00Salechecked Nov 14, 2026 | Check store | Buy at GrabAGun | |
| AR15Discounts 5% off | $300.00checked Nov 14, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $300.00checked Nov 14, 2026 | Check store | Buy at Dirty Bird | |
| Palmetto State Armory | $300.99checked Nov 14, 2026 | Check store | Buy at Palmetto State Armory | |
| MidwayUSA | $300.00checked Nov 14, 2026 | Out of stock | Buy at MidwayUSA |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $255.00 at MidwayUSA. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $300.00 | $300.00 | $300.00 |
| Ammunition Depot | $300.00 | $300.00 | $300.00 |
| Battlehawk Armory | $223.99 | $223.99 | $223.99 |
| Brownells | $300.00 | $300.00 | $300.00 |
| Dirty Bird | $300.00 | $300.00 | $300.00 |
| GrabAGun | $250.00 | $250.00 | $250.00 |
| GunMag Warehouse | $300.99 | $300.99 | $300.99 |
| MidwayUSA | $300.00 | $255.00 | $300.00 |
| OpticsPlanet | $300.00 | $300.00 | $300.00 |
| Palmetto State Armory | $300.99 | $300.99 | $300.99 |
Since Sep 27, 2026.
About this part
The AR-15/M16 Mk 4 Super Modular Rails, M-LOK - 9.3" Super Modular Rail Mk4 M-LOK BLK is a 9.3" AR-15 handguard from Geissele Automatics. It's sold by 10 stores (4 in stock), from $223.99 to $300.99. The lowest in-stock price in the last 30 days was $255.00 at MidwayUSA.
From the manufacturer
The Super Modular Rail MK4 M-LOK(TM) is Geissele's ultra-lightweight M-LOK option. These rails are purpose-built and feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o'clock positions. Maximum venting for heat dissipation also dramatically reduces the rails overall weight, while maintaining its same strong and rigid platform. The MK4 M-LOK rail features M-LOK slots at the 3, 6 and 9 o'clock positions as well as the upper 45Adeg quadrants. This allows the user to keep the weight on the rail system down, while keeping the modularity and versatility to attach accessories as necessary. Barrel nut wrench & gas block not in Mfg: Geissele Automatics
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