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Now if I could just find my shotgun I lost in an unfortunate SCUBA diving accident and then get some of these:

If you decide to go with the FRAG-12 HE grenade rounds (12ga.), you have three (3) types to choose from: the FRAG-12 HE (High Explosive), FRAG-12 HE-FA (High Explosive Fragmenting Antipersonnel), and FRAG-12 HE-AP (High Explosive Armor-Piercing a.k.a. High Explosive Armor-Penetrating), depending on the mission profile and requirements. The FRAG-12 grenade rounds utilize a 19mm warhead with a MIL-SPEC 1316 compliant fuze assembly, and arm 3 meters from the muzzle for safety to the shooter. Regarding armor penetration capability, the original Marine Corps Warfighting Laboratory (MCWL) literature on the FRAG-12 stated that the standard HE round will penetrate quarter-inch (1/4”) cold-rolled homogenous steel (CRHS) armor plate and make a one-inch (1-inch)-diameter hole. The same document states that the HE-AP utilizes a shaped-charge warhead to penetrate half-inch (1/2-inch) cold-rolled homogenous steel armor plate, making the same 1-inch diameter hole. However, Defense Review was recently told that the HE-AP will now penetrate ¾-inch CRHS armor plate (unconfirmed/unverified).

The FRAG-12 HE round contains 2.8 grams of pelletized A5 RDX high explosive powder. On impact, it detonates, and you get a big bang, and a lot of fragmentation from the metal casing of the round. The HE-FA anti-personnel round a.k.a. fragmentation round contains 90 stainless steel ball bearings, but it utilizes a smaller explosive charge (approx. 1.8-1.9 grams of high explosive) than the HE round.

125 FRAG-12 grenade rounds are currently being safety-tested at Naval Surface Warfare Center (NSWC) Dahlgren a.k.a. NSWCDD. Testing is expected to continue for approx. one more month. They’ve already been testing them for the last two months.

Source: DefenseReview.com (http://s.tt/13fps)