I copied this while pondering .50 BMG's last year
[i]Single Shot
.BMG AR-15 upper $1,200
http://www.watsonsweapons.com/
Pros: fits existing AR-15 lowers, no registration or FFL needed, affordable
Cons: accuracy & you have to wonder about reliability
Serbu Single-shot: $1,975
http://www.serbu.com/bfg50.htm
Pros: only 22 pounds, price/terms are good
Cons: delay?
Armalite Model AR--50: $2,515
http://www.armalite.com/
Pros: looks great
Cons: 41 pounds
Barrett Model M99: $3,000
http://www.barrettrifles.com/
Pros: 25 pounds
Cons: $$
Lars Grizzly Single-shot: $2,570
http://www.largrizzly.com/
Cons: 30.4 pounds
Bolt-Action
Serbu Bolt-action (magazine-fed): $2,595
http://www.serbu.com/bfg50.htm
Pros: only 22 pounds, 5-rd. mags, price/terms are good
Cons: bolt in odd position, delay?
Barrett Model M95: $4,950
http://www.barrettrifles.com/
Pros: 22 pounds, 5-rd. mags
Cons: $$
EDM Arms Bolt-action (magazine-fed): $8,250
http://www.edmarms.com/products.htm
Pros: 5-rd. mags, take-down nice feature, great package
Cons: 34 pounds, most expensive on the list??
Semi-Auto
Barrett Model M82A1: $7,200
http://www.barrettrifles.com/
Pros: 28.5 pounds, 10-rd. mags
Cons: $$[/i]