Just picked up a new upper in the 300 blackout.  It goes nicely with the 5.56 that came with the rifle.

Just picked up a new upper in the 300 blackout. It goes nicely with the 5.56 that came with the rifle.

Spikes Tactical Compressor SBR-300 BLK / EOTech .300 Blackout Holo Sight

Spikes Tactical Compressor SBR-300 BLK / EOTech .300 Blackout Holo Sight

PNW Arms Signature Series .300 Blackout Designated Marksman Rifle. (SSDMR)

PNW Arms Signature Series .300 Blackout Designated Marksman Rifle. (SSDMR)

.300 BLK cartridges compared with 5.56 and 7.62x39

.300 BLK cartridges compared with 5.56 and 7.62x39

300 Blackout ready for supressor with threaded muzzle device.

300 Blackout ready for supressor with threaded muzzle device.

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