I use a combination of the options. Apex ready Lapco if I wanna have options. Or just a trusty barrel kit at times. I do not have any rifled barrels.

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X7 w/ Egrip and w/ polished internals, Lapco Barrel kit w/ 12' and 14' fronts, Commando Air Thru Stock, front grip, 30mm TruGlo red dot, red hot power tube, Shock Tech Front Bolt, JCS JetClick Ratchet System, 90/4500 Nitro Duck, 80/3000 Scuba Tank w/ PSI Fill Station and a Palmer's Inline remote Stabilizer. And an A5 Egrip as my Backup.