NcSTAR Ultimate Tool Kit - AR15 100128 The light grey area is

The light grey area is folded outwards to create a lip with which to glue the box to the back of the proscenium front

keeping you comfortable during rigorous activities

Functionality

while the tactical design provides unmatched functionality

broadening compatibility with different firearms and setups

NcSTAR Ultimate Tool Kit - AR15 100128 The light grey area isKit includes a modular AR15 M4 upper receiver block for performing work on your upper receiver. Heavy duty barrel wrench works with MIL SPEC barrel nuts for installation or removal of the barrel and free float handguards with the same hole spacing. A 5 8 wrench on the opposite end for 5 8 muzzle brakes and flash suppressors. The wrench is also and 3 8 drive ratchet and breaker bar compatible. Heavy duty castle nut wrench for M4 MIL SPEC and commercial