Only with ATF registration first — or if your pistol's overall length is 26 inches or more. Adding a vertical foregrip to an AR pistol under 26 inches OAL reclassifies it as an "Any Other Weapon" under the NFA. You must file ATF Form 1 and receive approval before attaching the grip. As of January 1, 2026, the NFA tax stamp is $0 under H.R. 1 — the registration process remains but the fee is gone. Current eForm 1 approvals are processing in approximately 36 days. Attaching the grip before approval is a federal felony. If you want a foregrip on your AR pistol without paperwork, an angled foregrip is the legal alternative — the ATF has confirmed angled designs do not create AOW classification.

M-LOK is the current industry standard for modern handguards — most AR-15s built in the last five years use M-LOK. M-LOK foregrips use T-nuts that slot into rectangular openings in the handguard and torque down with a hex key. Picatinny (MIL-STD-1913) is the older standard found on many rifles, used for accessories that require maximum retention under impact. Picatinny foregrips clamp directly to the rail and some shooters find they hold position better under heavy use. Before purchasing any foregrip, verify your handguard's rail type. Most BCM and Magpul foregrips are available in both M-LOK and Picatinny versions — the BCM Gunfighter Mod 3 is available in M-LOK, Picatinny, and KeyMod.

California restricts "forward pistol grips" as a prohibited assault weapon feature on semi-automatic centerfire rifles with detachable magazines. A forward pistol grip — including most vertical foregrips — on such a rifle requires either a fixed 10-round magazine or a featureless configuration to remain legal under California law. Washington state also enacted a ban on forward pistol grips and vertical grips in 2023. Illinois and Connecticut impose additional restrictions. Always verify your state's current assault weapons statutes before purchasing. For state-specific restrictions, see our ammo and magazine laws guide.

The Magpul M-LOK MVG is the best value at $20-25 — lightweight at 1.4 ounces, flush-mounting, and designed specifically for thumb-break grip technique. For duty and hard-use builds, the BCM Gunfighter Mod 3 is the stronger choice — slightly heavier at 1.9 ounces but with a more aggressive texture, 5-degree forward cant for natural wrist alignment, reversible mounting, and availability in M-LOK and Picatinny. Both are made in the USA. For competition and AR pistol builds where AOW rules don't permit a VFG, the Magpul AFG M-LOK angled foregrip is the reference standard at 1.2 ounces.

Neither is universally better — they address different shooting styles. Vertical foregrips provide maximum pull-in force against the shoulder and natural barricade bracing, preferred for heavy calibers and shooters trained on traditional technique. Angled foregrips align the wrist in a neutral position, reduce fatigue over extended sessions, and work better with thumb-over-bore technique. About 70% of top USPSA and 3-Gun competitors use angled designs for faster transitions and reduced wrist strain. For defensive use and duty rifles, either works — the choice comes down to shooting style and hand position preference. For AR pistols, angled foregrips are the legal choice without NFA paperwork.