Our True Bolt Action Uppers are designed and intended to feed from standard AR style magazines.
For our UPR10 series of uppers and rifles, we recommend Magpul LR/SR 308 magazines for all calibers offered.
For our UPR15 series of uppers and rifles our recommendations depend on caliber.
For our 6 ARC and 6.5 Grendel, we recommend the Amend 2 , 6.5 Grendel magazine. The Amend 2 mags are the smoothest feeding and most reliable mags that we have tested to date for 6.5 Grendel and 6 ARC.
For 224 Valkyrie, we recommend the CProducts Duramags in 6.8 SPC.
For 223 Wylde and 300 Blackout nearly any brand will work. We run and recommend Magpul Pmags.
All of these mags are available through us by going to Shop>Magazines.
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