Accurising the TSC/GSG 1911
Valmont Firearms but, expect to pay a little more. Check out
www.briley.com ,
www.midwayuk.com and
www.valmontfirearms.co.uk
The barrel diameter is 0.549 inches and the bushing 0.581inches – a clearance of 32 thou. We need to reduce this to a couple of thou.
With a proper 1911 tune-up, this clearance would be a gunsmith operation – matching the bushing to the barrel but now, we can actually buy a barrel-bushing kit in a choice of sizes, thanks to a clever bit of thinking.
The Briley Bushing Kit To be honest, I’m out of touch with 1911 bits
& bobs and I was about to try to make my own tighter bushing - until I got an e-mail from Target
Installing the Briley bushing – first, fit the outer bushing then insert and rotate the carbide bushing – simple!
Briley also consider the other fit – the ‘bushing to slide’ fit. The bushing housing is supplied slightly oversize, allowing you to turn it down (providing you have a lathe) to exactly fit the slide. To make this job easier, a threaded mandrel is supplied with the kit enabling you to hold the bushing easily in the lathe chuck. Do this properly and you have as good a job as most gunsmiths will accomplish – at minimal cost.
The kit contains a new barrel-bushing and, here’s the clever bit – a second ‘spherical’ bushing that fits inside the barrel-bushing.
Shooter reader James Bennett. James told me about the Briley bushing kit, which is a really clever solution to the problem. Not only did James tell me about the Briley – he actually sent me one! The kit is of course American and costs around £40. You can order direct or get one via Midway UK or the aforementioned
109
The GSG ‘bushing to slide’ clearance was about 15 thou. The oversize Briley bushing is supplied just too big to fit the slide, so that it can be turned down to an exact fit. I turned about three thou. off it. However, when I put the pistol back together, the slide was ‘binding’ slightly. I couldn’t do anything about the two-thou. clearance on the barrel-bushing insert so, I decided to skim another couple of thou. off the ‘bushing to slide’ fit – giving me about 5 thou. clearance - still ten thou. closer than the original - it cured the binding.
To order the correct bushing, simply measure the diameter of your barrel, add one thou. and that’s your bushing size! This ‘bushing within a bushing’ looks like a small wedding ring, for it is made of bronze with a carbide insert. It’s easily installed in the housing by pushing it in sideways and then rotating it. It is free to move a little – thus ensuring perfect alignment. My bushing gives me two thou. clearance and personally, I think this is plenty close enough as the GSG barrel doesn’t ‘float’ like a proper 1911 barrel.
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