Just finished up my M3's Compact 600MM shroud. Shorter and and Carbon Fiber. Let me Know what you Think! DonnyFL KOI for slugs and the Tanto for Light pellets to lose some more length.
It is a 580cc bottle and I will have to get back with on the OAL. And the Superior liner shoots 36.2 Nielsen's around MOA consistently. And I appreciate the Kind words!