Of all the Airsoft Claymores I've seen thus far, the Gamma M33 Claymore mine is my favorite. It is remote-detonated, and each mine can be configured to up to sixteen different frequencies. The appeal of the Claymore in airsoft skirmishes is that it is small and can be easily camouflaged, is as effective as a close-range shotgun burst, and has the delightful ability to catch your opponent off guard and make him wet himself. Multiple mines in a "U" configuration could easily wipe out an entire squad in tight formation. For those of you who like to set ambushes and use the element of surprise to your full advantage. You ghillie suit nuts especially.
YouTube - Gamma m33 Airsoft Claymore Demo / Instructional