WTS: Bushmaster/MSTN Mk12 Mod0 SPR w/ US Optics SN4
MSTN-assembled Mk12 Mod0 upper on Bushmaster lower. 18" Mk12 Mod0 barrel with fitted bolt. With Ops Inc military brake and collar, PRI flip-up front sight/gas block, ARMS SPR rail (no BUIS). Upper is MSTN-test fired only, has test target of .522 5-shot group.
Bushmaster lower has Hogue grip and KAC two-stage trigger.
US Optics SN4, 1-4x with illuminated circle/dot reticle, flip-up caps, on Posa-slide & lock mount.
Excellent condition overall, upper is test-fired only. Selling to finance 6.8 SPC project.