*UK Sales only* A genuine U.S. Vietnam War era inert M3 tension and release firing device. Was used to connect to U.S. anti-personnel mines, hand grenades & bangalore torpedoes. It features at the top a ratchet wheel with leaf spring and is activated by tripping or cutting the connected trip wire. No markings to body and is probably a training version. Complete with two original safety pins and original securing lines. Scarce item. We cannot accept PayPal on this item, payment must be by debit or credit card, please choose 'Worldpay' at checkout. *UK Sales only*. We can only send to UK address, we do not ship this type of product outside the UK due to British customs restriction, this includes The Isle of Man, Isle of Scilly and the Channel Islands due to flight restrictions.