Can someone help me out with a measurement off of a Samson MRFS rail? I need to know the minimum inside diameter of the tube (cross section at the smallest point.) I'm hoping it is large enough for a custom JP gas block (offered by Randall_Rausch of
www.ar15barrels.com)
Otherwise, I'll have to use a YHM or PRi tube for my 300x221 build....
Thanks!
Scott