Cimarron MP680: The 'Model P featuring Cimarron's superior fit and finish has long been the most authentic and highest quality reproduction of the 1873 Colt. Rugged and dependable inside, the new Model P with Cimarron's Cowboy action eliminates weaknesses associated with the 19th-century design of the 1873 Colt single action. The 4 3/4" barrel is the most popular length for lightning-fast perfect balance. These pre-war style guns have the quick-release cylinder pin. The cylinder pin has two positions, fully inserted it acts as a hammer block safety.