AR-15 Tactical Foregrip Fits Picantinny Rails, slotted for pressure switches, removable tail cap compartment holds spare batteries for your weapon accessories, either AA or Lithium batteries, 5" length, not legal to install on weapons with a barrel shorter than 16", check your laws before ordering. For Law Enforcement Use ONLY, not legal to install on most rifles or pistols with a barrel shorter than 16" . Stay camouflaged in desert environments.