From a few years ago.


Colt M4 with Geissele SSF, SWFA SS 3-9x, A2 FH, and using MK262 Mod1 ammo. The test was that the gun was zeroed at 100 yards on a NRA B8 bull from sand bags, with over lapping bulls replaced each cycle. 20 rounds were used to confirm zero (2x10), and then two rounds per 10 different positions/rests/attachments.

Standard KAC handguards on left, the exact same gun with drop in Troy Delta rail on right.

[Linked Image]