stock 11" Proto barrel is 0.688 so altogether, you'll have a makeshift barrel kit (1x 11" 0.688, 1x 14" 0.692 or 1x 14" 0.684) for far cheaper than a red pepperz kit.
for a cheap and light barrel set would get the unitech barrel set from warped brand new for £60 i swear by mine so much so it has made my freak kit redundant
for a cheap and light barrel set would get the unitech barrel set from warped brand new for £60 i swear by mine so much so it has made my freak kit redundant