I have several BH cylinders. What are the dimensions of your current cylinder?

Yes this one is a .450 Marlin. Its a beast.

Nice. Is your 450 a 450 Marlin? I have always though that 450 Marlin was a much underrated cartridge that deserved much wider popularity. I noticed one of our local retailers recently had new 450 Marlin Hornady brass , which was interesting because Hornady had previously indicated they were discontinuing production. Hopefully they are still going to make the occasional batch, much like they do for some of the big bore classic cartridges.

Nice fat little buck. 160 yards

I bought an aluminum flat black trigger from Apex International for use on my M&P 2.0 10mm and bought one that was for M&P 2.0 45 Auto, 9mm, and 40 S&W as none was made by Apex for the M&P 2.0 10mm at the time. Took the part to my local gunsmith to be installed on mine. He said it was not made for the 10mm because the 10mm frame is larger. But he said they could do it and so they went ahead. It is for duty so it was not real light. But it replaced the flat plastic trigger that came with it with an aluminum trigger so I am satisfied.

A quick update. I've fired a further 300 rounds through the Glock. This means a total of 500 rounds without any 'light strikes' since replacing the striker spring and channel liners. I'm now quite confident that the earlier 'light strikes' were caused by an age weakened striker spring and not by the Timney Alpha trigger. Everything is working reliably and the clean breaking 3lbs trigger is a joy to use.