HEDS 0 Posted March 10, 2010 Report Share Posted March 10, 2010 Have been looking at a 20g 3" Mag Investarm O/U. Details punched into barrels are as follows : Hard Chrome , PSF . FNL . [bF] There is also a shield type mark , and also the serial no. I would like to know if the gun is proofed to take steel. Also what is the 'steelproof' mark that gun buyers should be looking for? Any info is good info. cheers H Quote Link to post
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