Looking to upgrade my Hardy mod on a .308. The Macc Tecc V2 (made by Barton GunWorks and sold as Mac Tecc by Edgar Bros) looks usefully smaller and lighter than my Gen 4 Hardy. I believe they come standard on a Mauser M12 Impact. Anyone know if they are any good? Also if anyone uses the smaller V1 version on a .308 I would be interested to know how effective they are?