The U.S. military fields three main categories of foregrips on its service rifles and carbines: vertical grips, angled grips, and hand stops. The Knight’s Armament vertical foregrip has been standard on special operations M4A1 carbines since the late 1990s, but the trend across elite units has moved toward lower-profile angled grips like the Magpul AFG and various hand stop designs that better support modern shooting technique. Which grip a unit actually uses depends on the mission, the weapon, and how the shooter holds the rifle in a fight.
Vertical Foregrips
Vertical foregrips hang straight down from the handguard, which is where the nickname “broomstick” comes from. They became standard military equipment when USSOCOM introduced the SOPMOD (Special Operations Peculiar Modification) Block I kit for the M4A1 carbine around 1997. The Knight’s Armament Company vertical grip was a core component, giving operators a solid gripping surface on the M4’s short handguard, which had become crowded with weapon lights and infrared lasers. The grip also kept hands off rails that could get painfully hot during sustained fire.
Full-length vertical grips give a locked-in hold that works well for managing recoil during automatic fire and for pulling the rifle firmly into the shoulder. Some operators use the lower portion almost like a monopod, resting it on barricades or vehicle surfaces for improvised stability. The downside is bulk. A full-size vertical grip adds to the weapon’s profile and can snag on gear, doorframes, and vehicle interiors during close-quarters work.
Stubby vertical grips like the Tango Down BGV series trim the grip to roughly half the length of a standard vertical foregrip. They function less as a true pistol-style grip and more as a reference point that keeps the support hand from sliding forward toward the muzzle. Stubby grips remain popular across conventional and special operations units because they offer most of the control benefit with less snag risk. Both full-size and stubby variants from multiple manufacturers appear in SOPMOD Block II kits alongside other grip options.
Angled Foregrips
Angled foregrips position the hand at roughly 30 to 45 degrees relative to the bore rather than perpendicular to it. The Magpul AFG (Angled Fore Grip) is the most widely recognized design and was built specifically to support a “C-clamp” hold, where the shooter wraps the thumb over the top of the handguard with the remaining fingers pulling rearward underneath. This grip style drives the muzzle down during recoil and speeds up transitions between targets.
Biomechanics drive the choice. A vertical grip was originally designed so shooters could wrap their whole hand around it and use the support thumb to activate weapon-mounted lights and lasers. That hold controls accessories well but doesn’t give the strongest shooting platform. The C-clamp technique, paired with an angled grip, lets the shooter apply more rearward pressure into the shoulder pocket while keeping the wrist in a neutral position that reduces fatigue over long patrols or training blocks.
Angled grips also sit closer to the handguard, giving the weapon a slimmer profile. For units that spend a lot of time moving through tight spaces, transitioning in and out of vehicles, or working with plate carriers and chest rigs, that lower profile is a real operational advantage.
Hand Stops
Hand stops are the most minimalist option. They’re small protrusions or fins mounted to the handguard that act as tactile index points, telling the shooter’s support hand where to sit without adding a dedicated gripping surface. The hand wraps directly around the handguard itself, and the hand stop prevents forward slip.
Products like the Emissary Development Handbrake and the Lanco Tactical GripStop have gained traction with special operations units that prioritize weight savings and a clean rail. Hand stops double as barricade stops, letting the shooter brace the weapon against a wall, windowsill, or vehicle hood for improvised stability during precision shots. For a unit that might patrol for hours on foot and then need to shoot accurately from an awkward position, a hand stop weighing an ounce or two can outperform a heavier grip that mostly goes unused.
Why the Choice Has Shifted
The move away from full-size vertical grips and toward angled grips and hand stops tracks directly with how military shooting doctrine has evolved. When SOPMOD first issued vertical grips in the late 1990s, the primary reason was accessory management. Operators needed the support-hand thumb free to toggle pressure switches on weapon lights and PEQ laser units. Wrapping the whole hand around a vertical grip made that easy.
Over time, shooters and instructors recognized that this hold sacrificed stability. The support hand perched on a vertical grip near the magazine well couldn’t apply enough forward pressure to control muzzle rise during rapid fire. The fix was to mount the grip further out on the rail and use only the last few fingers against it while the thumb rode the top of the handguard, forming the C-clamp. At that point the vertical grip was functioning less as a grip and more as a hand stop, which raised the obvious question: why not just use a purpose-built hand stop or angled grip instead?
That evolution explains why many Special Mission Units and the 75th Ranger Regiment have moved toward angled grips and hand stops. Vertical grips didn’t stop working. Shooting technique outgrew the original design purpose. Operators who still prefer vertical grips tend to use stubby variants positioned further forward on the handguard, essentially using them the way they’d use a hand stop but with slightly more surface area.
Unit and Branch Preferences
Foregrip selection across the military is less standardized than most people assume. USSOCOM units have broad latitude to select accessories through programs like SOPMOD, which offers multiple approved grip options rather than mandating a single model. Individual operators within the same team may run different setups based on personal preference, hand size, and shooting style.
The SOPMOD Block I kit issued in the late 1990s centered on the Knight’s Armament vertical grip, and that design remained the default through the early years of Afghanistan and Iraq. Block II expanded the approved options to include the Tango Down stubby grip, the Magpul AFG, and hand stops. Special operations armorers increasingly stock a range of options and let operators pick what works for them.
The Marine Corps takes a somewhat different approach. For the M27 Infantry Automatic Rifle, which serves as the standard-issue rifle for Marine riflemen, the Corps specifies authorized attachments through formal messages rather than leaving selection to individual Marines. The M27’s accessory package emphasizes bipods for the sustained-fire role the weapon fills, though vertical grip sleeves are part of the issued kit as well.1Marines.mil. Authorized Individual Weapons, Optics, Modular Attachments and Modifications
How Foregrips Attach
Every foregrip needs a way to lock onto the weapon, and the military’s primary standard is the Picatinny rail, formally designated MIL-STD-1913. The specification defines exact dimensions for the rail’s slots and ridges so that any compliant accessory fits any compliant rail across all branches and weapon systems.2EverySpec. MIL-STD-1913 – Dimensioning of Accessory Mounting Rail for Small Arms Weapons A foregrip purchased for an M4 will physically mount on an M249 machine gun’s rail without modification.
Picatinny rails add weight, especially on handguards with full-length rails on all four sides. Magpul’s M-LOK system, which uses slots cut directly into the handguard rather than raised rail sections, has gained ground as a lighter alternative. Military and federal entities have adopted M-LOK handguards on newer weapon configurations, and most major foregrip manufacturers now produce M-LOK versions alongside Picatinny models.
One Rule Civilians Should Know
The military can attach a vertical foregrip to whatever it wants. Civilians cannot. Under the National Firearms Act, attaching a vertical foregrip to a handgun changes that weapon’s legal classification. The ATF has held for years that a handgun with a vertical foregrip is no longer “designed to be held and fired by the use of a single hand,” so it no longer qualifies as a pistol under federal law.3ATF. Add a Vertical Fore Grip to a Handgun The reclassified weapon falls under the NFA’s “any other weapon” category, which requires ATF registration, fingerprints, and a background check before assembly.4Office of the Law Revision Counsel. 26 USC 5845 – Definitions Skipping that process and simply bolting a vertical grip onto a pistol is a federal felony carrying up to 10 years in prison and a $10,000 fine.5Office of the Law Revision Counsel. 26 USC 5871 – Penalties Angled foregrips and hand stops generally do not trigger this reclassification, which is one reason angled grips have become popular in the civilian AR-pistol market.
The Bottom Line on Military Foregrips
The honest answer to what foregrip the military uses is that it depends on the unit, the mission, and increasingly the individual shooter. Conventional infantry units tend toward whatever vertical or stubby grip comes standard with their issued weapon package. Special operations units have more flexibility and have broadly trended toward angled grips and hand stops over the past decade, driven by changes in shooting technique rather than any single procurement decision. The vertical grip isn’t going away, but its role has narrowed from default choice to one option among several, and the shooter who picks it today usually mounts and holds it very differently than operators did in 2003.