http://www.aimsurplus.com/product.aspx?item=XBC15Blk&groupid=144
The BattleComp 1.5 offers muzzle control like some of the best brakes on the
market, with none of their liabilities. A true tactical compensator
specifically designed for military and law enforcement operators who use the
AR15 platform for CQB. The BattleComp gives the tactical operator excellent
control WITHOUT the excessive concussion and crushing blast produced by
most compensators on the market — with flash comparable to an A2.
$155