"5mm ? A Sheridan/Benjamin I presume ?"

Uh, no! Surpassing all belief, here in notorious Southern California I live within 15 minutes of both Safari Books and Beemans's airguns. They don't even carry Benjamin. Had the wretches trespassed onto my driveway, I'd have put a quiet, pointed little pill right through whatever passes for the brain on a peacock . . . a bubble, probably, or possibly a cyst.