I'm in the process of my first AR build. Waiting for the upper to arrive so I thought I would play around with the barrel & accoutrements to see how everything fit together but ran into a problem with the gas block.
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Here's what I have: A BCM takeoff barrel (16" carbine gas), the A2 FSGB that I am "pretty sure" was the original one installed on this barrel, and a generic handguard end cap I got from Brownells branded as SOLGW.
Here's the problem: I just can't get the GB far enough back to line up the existing pin holes. It's "almost" there, by my calibrated eye.
So what's my best (most economical without doing something cheesy) route here? Is there a chance another end cap would be noticeably thinner? Should I try to take a little metal off the end cap, or maybe the back of the gas block? It seems there should be a fairly simple solution because as I said I'm pretty sure this was all together at one point, excepting the end cap. Is there something else I'm completely overlooking?
