6 with flat. AMMO IN-STOCK. Nice piece Stribog SP9A1 (Nick Leghorn for TTAG) Just as with the APC-9 or FN's SCAR series, the upper receiver is technically the "firearm" and the lower receiver can be swapped out at will 00; carbines without thread on the barrel MEDIUM Stribog Glock Lower It comes a Magpul MOE stock and K2 pistol grip, a 16” threaded barrel, and one 15-round Glock magazine. Grand Power Stribog SP9A1 9mm.