It most likely is from the Fantom line of guns that briley is marketing. The type of gun was originally built by Fred Craig, I think his is KS someplace. If I can find a number for him, I'll add it. It used the caspian hicap frame as the base and was made in 38 super, 40S&W and 45ACP. He also made one that was gas operated called the Vortax, i think. Then at some time, not sure Briley picked it up.
This from the Briley site.
http://www.briley.com/pistol.html
There are couple of photos at the bottom of the page. That is good price if you can find mags as new they are $1800.00
Complete 1911 compact pistol built on a light weight alloy Caspian wide body frame. Includes Briley dovetail front sight / fixed rear sight low mounted / Briley match barrel / lowered and flared ejection port / front and rear cocking serrations / alloy guide rod / Briley extended ejector / match grade trigger - hammer - sear / narrow ambidextrous thumb safety / beavertail grip safety / top of slide flattened and lined 40 lpi. / all parts fitted and tuned / one magazine / hot blue finish on top end, Armor coated lower.
Available in 45ACP / 40 S&W / 9MM / 38 Super
SPECS F-15 F-13 F-10
Caliber 9MM / 38 Super 40 S&W 45 ACP
Capacity 10 Rounds 10 Rounds 8 Rounds
Weight 24 oz. 23 oz. 22 oz.
Barrel Length 3.6" 3.6" 3.6"
Trigger Pull 3.5 lbs. 3.5 lbs. 3.5 lbs.