These days, U.S. M1917 bayonets command a premium over the P’13 bayonets, even though about 2.5 million M1917 bayonets were made. U.S. M1917 Vs. British Pattern 13 Bayonets | An Official Journal ...

In 1815, 2,000 Pattern 1805s were modified to accept a unique triangular socket bayonet by removing the sword bar, trimming back the stock and adding a small under-barrel lug. It is such an arm ...