I have, which is why I commented. It made the rifle too front-heavy, especially for 3-gun. The polymer rear just doesn't balance out the weight of the gun very well.
Well there you have it, figured the front heaviness would help reduce muzzle climb, had an ACR which was quite front heavy compared to an AR and it had significantly less muzzle climb; but then again the whole rifle was quite a bit heavier than an AR.
Cpl Williams, Evan T. USMC-R, 02-08-2010 ~
D Co, 4th CEB, Engineers UP!! OEF 21JUN-20SEP2011
REV. 19:11 And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.