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Liver, I don't understand the purpose, can you explain your reason? I could understand, if you are talking about something like Briley's Spherical Bushing for a 1911 model, because the Sig barrel HAS to tilt within the "muzzle port" in the slide, to lock up into the ejection port.

To be honest, I've not seen a Sig Slide replaced due to wearing out at the muzzle port, but I have seen barrel bushings wear out on 1911s.
 

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Discussion Starter · #3 ·
Mainly for further increasing accuracy. Squeezing the last bit out of this platform. Hitting the point of diminishing return.

Just a tad more lock up. That's all.

Sure I could get another gun, but that's why it's a hobby. Currently I have it coated in NP3 and have an RMR on it. It's a 40 with a match Bar Sto fitted 9mm conversion barrel. The 40 frame is highly recommended for milling for an RMR.
 

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Just a hint, almost any production firearm that comes out of a reputable company(Sig, Beretta, Glock, S&W, Walther, H&K, ect.) will outshoot the shooter. And like Willard said, both the 1911 and the 92 use different locking mechanisms that don't require a cant of the barrel upon cycling like the P226, P229, Glock, P320, and almost any other modern semi-auto nowadays uses. There is a required amount of play in the barrel housing at the muzzle end that is built in, and it's best not to mess with it.
 

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Hello Liver, SIG owner since the '80s here. I was also a LE SIG, Colt and other manufacturer's armorer for years. Reference a tad more lock up at the muzzle of the SIG. The barrel to slide fit of the SIGs, to include the muzzle area, is just excellent. No matter the era of manufacture. Wish some of my 1911s fit so well. I admit I'm perhaps a bit OCD about fit of component parts on pistols I own. I still own a few SIGs, and just don't see how SIG lock up at muzzle could be improved with a special bushing, while maintaining functional reliability......ymmv
 

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The only thing I can see is maybe a rubber o-ring on the barrel like with the HK45. But the barrel would need a small channel engraved into it to keep the o-ring in place.
 
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