Tactical Ergonomic Foregrip with Pressure Switch Area & Battery Compartment. The Front Grip is 5.4 inches in height from the base, the side profile is 1.8 inches wide near the base, 1.4 inches at the thickest dimension, Weighs 6 ounces. This is an excellent choice for those mounting tactical lasers or lights. Fits hand guards equipped with a Weaver or Picatinny rail system. Non-slip Features Battery Compartment (AA Batteries 2 each or 123A 3 each) Pressure Switch Housing both Right & Left sides Moulded from reinforced plastic composite. Great for M4, AR15, M16, AK47, MP5, GSG5 with tactical rail