Out of curiosity, what low profile gas block does BCM use when they build uppers with rails? Would it be possible to have this gas block installed instead of the front sight block on a bare upper?
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Out of curiosity, what low profile gas block does BCM use when they build uppers with rails? Would it be possible to have this gas block installed instead of the front sight block on a bare upper?
If I remember the middy URX is 11.5" in length. Also remember that the mid-length gas system on the KAC rifles are longer than the middys from BCM and Armalite. BCM is handguard is 9" plus the fsb (appox 2") so I would think that the URX should be 1/2" or so past a shaved FSB.
question here.....would these have feed ramps or no?
They will have these specs...
M4 Feed Ramp Barrel Extension
M4 Feed Ramp Flat Top Receiver
T-Marked Upper Receivers
USGI 1/7 Twist Rates
USGI 5.56 NATO Chambers
Mil-Spec 11595E - (Certified) Barrel Steel
Chrome Lined Bore and Chamber
Manganese Phosphate Barrel Finish
Mil-Spec F-Marked Forged Front Sights
USGI Government Profile Barrels
HPT (High Pressure Test) Barrels
MPI (Magnetic Particle Inspected) Barrels
droooooolllllll
I believe with a mid-URX and BCM mid-length gas system the gas block would contact the hinge for the folding front sight which protrudes into the internal space of the rail. I don't have one in front of me right now to verify, so you may be right, it could clear. Perhaps KevinB can educate.
No matter what, the URX is a slick set up.
Al