Black Rain 16" M4 Fluted Barrel, Carbine Length Gas, Stainless Steel, Polygonal 3 Rifling, .223 Wylde Chamber

Black Rain
ARR-691
BRO-16M4EMF
ARR-691
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Specifications and Features:
Black Rain Ordnance, Inc. M4 Barrel
416R Stainless
16" M4 profile
Carbine gas system length
.750" at gas block
Fluted
.223 Wylde chamber
M4 feed ramps
Polygonal 3 rifling
1:8 twist rifling

The .223 Wylde chamber allows for the use of plentiful and inexpensive 5.56 NATO ammo while having a slightly tighter chamber tolerance than 5.56 NATO for improved accuracy.