Data Point
BCM 16" ELW BFH KMR-A upper with a SF 3-P FH muzzle device.
Lower was previously equipped with a carbine tube/spring and H buffer, which ran with no issues.
My go-to load is the .223 Gold Dot 75, which has run 100% in this rifle and has proven to be consistently precise (5-shot groups typically hovering just over 1 MOA at 100 yards). I shoot mostly XM193 when dinking around at the range, which also ran 100%.
A few weeks ago I installed the
BCM A5 kit (using the A5H0 buffer that came with it) and the rifle remains as boringly reliable as ever, though it
seems to be smoother. Ejection is around 2 o'clock with about 4 - 5 feet of throw,
and very consistent regardless of load. Ejection seemed a touch stronger with the carbine buffer set up but was not quite as consistent in terms of where the casings landed - I guess that tells the story right there.
Count me as pleased with the purchase.
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