QRB WORKS FOR ALL CALIBERS THAT OPERATE ON AR-15 UPPER RECEIVERS<\/p>\n
The QRB Kit can only be used on Barrels with a maximum outside diameter of\u00a00.985″\u00a0<\/span>and Free Float Hand Guards with a maximum width of\u00a02.0″<\/span><\/p>\n The QRB is able to retain POA\/POI as the barrel still “head-spaces” off the stock positions (our tests have shown accuracy retained to less than 1 MOA of original rifle setup!).<\/p>\n Use GROSS MOTOR SKILLS to assemble due to two piece gas system. No lining up tiny gas access hole with gas tube first!<\/p>\n With the purchase of an additional Barrel Lock Plate, switching to a different barrel length or caliber, like the 300 Blackout, takes just seconds!<\/p>\n Super fast barrel and upper cleaning!<\/p>\n