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Geissele Automatics
The Geissele Automatics Super Modular Rail (SMR) for the HK 416 platform is a precision-machined replacement handguard engineered for shooters who demand modularity without compromise. This 10.5" SMR is optimized for 10.5" barrel builds and offers the same battle-tested design trusted by professional operators. Built from 6061-T6 aluminum and finished in Type 3 hardcoat anodize to military specifications, it delivers the strength and rigidity needed for serious duty or competition work while maintaining full compatibility with your HK 416's stock barrel nut.
The SMR's defining feature is its modular mounting system. Steel inserts at the 3, 6, and 9 o'clock positions accept standard rail sections, creating rock-solid steel-to-steel connections for lights, lasers, grips, and other accessories. This approach keeps your rifle lightweight and purpose-built—you mount only what you actually need, rather than carrying a full quad-rail you won't use. The 10.5" length (with an actual rail measurement of 9 3/8") balances workspace with compact handling, making it well-suited for CQB drills, short-range tactical setups, or as a fighting gun when real estate matters.
At 12.96 oz, the SMR won't slow your transitions or tire your support arm during extended shooting. The 1.35" inner diameter fits the HK 416 system perfectly, while the Type 3 anodize finish resists wear and corrosion in the field. Whether you're running a duty carbine, training hard, or building a precision 416 for competition, the Geissele SMR delivers the modularity and construction quality that separates working guns from off-the-shelf builds.
| Length (nominal) | 10.5" |
| Actual rail length | 9 3/8" |
| Height | 2.51" |
| Inner diameter | 1.35" |
| Outer diameter | 1.9" |
| Weight | 12.96 oz |
| Material | 6061-T6 aluminum |
| Finish | Type 3 hardcoat anodize |
| Color | Black (DDC variant in Flat Dark Earth available) |
| Platform | HK 416 |
| Barrel compatibility | Optimized for 10.5" barrel |
Yes—the Geissele SMR is designed as a direct replacement for the standard HK 416 rail and uses the stock barrel nut, so no additional adapters or modifications are needed. This 10.5" version is optimized for 10.5" barrel builds.
The SMR accepts standard rail sections at the 3, 6, and 9 o'clock positions using its steel inserts. This lets you mount lights, lasers, vertical grips, backup iron sights, and other modular rail-compatible accessories exactly where you need them.
The 10.5" SMR weighs 12.96 oz, keeping your rifle light and fast for dynamic shooting or duty use.
The 10.5" SMR is optimized for 10.5" barrel length and has an actual rail length of 9 3/8", while the 14.5" version is optimized for 14.5" barrels with a 13 5/8" actual rail length. Choose the version that matches your barrel length for proper fit and balance.
Geissele Automatics
The Geissele Automatics Super Modular Rail (SMR) for the HK 416 platform is a precision-machined replacement handguard engineered for shooters who demand modularity without compromise. This 10.5" SMR is optimized for 10.5" barrel builds and offers the same battle-tested design trusted by professional operators. Built from 6061-T6 aluminum and finished in Type 3 hardcoat anodize to military specifications, it delivers the strength and rigidity needed for serious duty or competition work while maintaining full compatibility with your HK 416's stock barrel nut.
The SMR's defining feature is its modular mounting system. Steel inserts at the 3, 6, and 9 o'clock positions accept standard rail sections, creating rock-solid steel-to-steel connections for lights, lasers, grips, and other accessories. This approach keeps your rifle lightweight and purpose-built—you mount only what you actually need, rather than carrying a full quad-rail you won't use. The 10.5" length (with an actual rail measurement of 9 3/8") balances workspace with compact handling, making it well-suited for CQB drills, short-range tactical setups, or as a fighting gun when real estate matters.
At 12.96 oz, the SMR won't slow your transitions or tire your support arm during extended shooting. The 1.35" inner diameter fits the HK 416 system perfectly, while the Type 3 anodize finish resists wear and corrosion in the field. Whether you're running a duty carbine, training hard, or building a precision 416 for competition, the Geissele SMR delivers the modularity and construction quality that separates working guns from off-the-shelf builds.
| Length (nominal) | 10.5" |
| Actual rail length | 9 3/8" |
| Height | 2.51" |
| Inner diameter | 1.35" |
| Outer diameter | 1.9" |
| Weight | 12.96 oz |
| Material | 6061-T6 aluminum |
| Finish | Type 3 hardcoat anodize |
| Color | Black (DDC variant in Flat Dark Earth available) |
| Platform | HK 416 |
| Barrel compatibility | Optimized for 10.5" barrel |
Yes—the Geissele SMR is designed as a direct replacement for the standard HK 416 rail and uses the stock barrel nut, so no additional adapters or modifications are needed. This 10.5" version is optimized for 10.5" barrel builds.
The SMR accepts standard rail sections at the 3, 6, and 9 o'clock positions using its steel inserts. This lets you mount lights, lasers, vertical grips, backup iron sights, and other modular rail-compatible accessories exactly where you need them.
The 10.5" SMR weighs 12.96 oz, keeping your rifle light and fast for dynamic shooting or duty use.
The 10.5" SMR is optimized for 10.5" barrel length and has an actual rail length of 9 3/8", while the 14.5" version is optimized for 14.5" barrels with a 13 5/8" actual rail length. Choose the version that matches your barrel length for proper fit and balance.
