01-21-2019, 09:58 PM
New builder here on first Grendel build.
Is the ejection port size of concern with a Grendel?
I'm building Aero Precision, but do I need an XL upper?
Thanks in advance,
Is the ejection port size of concern with a Grendel?
I'm building Aero Precision, but do I need an XL upper?
Thanks in advance,

