As seen in this Frommer Stop, Long Recoil is similiar to Short Recoil, but the slide and barrel move together for the entire length of the cartridge, before the barrel returns to position followed by the slide. The Frommer Stop is one of only a handfull of long recoil firearms to ever be made, and one of only 3 that have been successful. The only other long-recoil guns to be produced in significant numbers were the Remington Model 8 autoloading rifle (and the Model 81 variant thereof) and the famous Browning Auto-5 semi-auto shotgun.
Excellent lustrous rich green crystals of Titanite admirably cover the display face of the specimen. Many of the Titanite crystals are wedge shaped twins mostly gemmy to translucent. A diagonal zone of very deep green crystallized Chlorite runs across the specimen, and also some further areas. The matrix is a banded Chloritic/Feldspar rock, with scattered crystals of Pyrite.