These Briley fore end caps for the Beretta Urika and Teknys models are manufactured out of 17-4 Stainless Steel. They are available in bright stainless and black oxide finish. The cap is specifically designed to be disassembled so as to be cleaned. The Beretta fore end cap is prone to accumulating carbon and powder residue which in the long run will cause it to seize. It is recommended that they are regularly opened and cleaned. Simply unscrew and separate the two sections. Remove the spring and retaining washer, clean and re-assemble (Not compatible with A400 model). These can be bought as a complete assembly or the weights alone.