B-Square Magazine Doubler .223 REM/5.56 NATO 2/30 rd AR-15 Black F - 223 Remington/5.56 NATO Caliber, 30 Rounds, Aftermarket Origin, AR-15 Model

The B-Square Black Magazine Doubler makes it quick and efficient to reload with a second magazine and is excellent for seated and prone shooting positions. The magazine doubler seats two AR-style magazines so they are staggered enough to clear the ejection port. The rounds are protected from dirt by 2 top round protectors. This magazine doubler is not compatible with Mag-Pul Magazines.