An additional 6,000 pistols were produced and sold during this period for a total of about 9,000. Sanford continued to sell spare parts until his death in 1996. His son Walter continued to sell the remaining parts online through automagparts.com. Production guns were made in .44 AMP. Experimental pistols were made in .45 ACP, .30 AMP, .357 AMP and .41 JMP. Changing calibers usually required only exchanging the barrel – the frame, magazine and bolt could be used with all calibers except .45 ACP.