“Magpul MAG012-BLK XT Rail Panel Black” has been added to your cart. View cart

American Precision Arms G4F5865N Gen 4 Fat Bastard Self Timing Nitride 5/8″x24 Threads 3.30″ OAL 1.10″ Diameter 6.5mm

SKU: ss_177591

UPC:

$177.06

Out of stock

Want to be notified when this product is back in stock?

The new calibrated U.R.P tunable top ports have been designed for maximum adjustment making the Gen 4 line of brakes the flattest shooting brakes available hands down. By testing port size, location, and how the gas feeds into them, we have been able to make these tunable top ports capable of generating zero vertical movement.