I was wondering if it was possible to use longslide barrels in a normal slide for a little extra velocity. While this wouldn’t look particularly pleasing, would it be safe? Would it interfere with the pistol’s cycling in any way? Thanks.
Be advised that many 1911 barrels are slightly larger at the muzzle for a close bushing fit, then step down slightly for free movement in recoil. So a true longslide barrel might be loose in a standard 5" slide's bushing. Can be taken care of in gunsmith fitting, or...
I think Kart will make a 6" barrel with bushing contact and relief correct for a 5" slide.
Velocity gain might not be more than 30 or 40 fps, depending on powder. Is that worth a couple of hundred bucks?
That was a popular thing back in the early days of practical pistol competition. It will add a little velocity with no disadvantages. Most all, and the Wilson for sure, 6 inch barrels have long enough bushing fitting areas to work with a 5 inch slide.