Mossberg’s 590 Shockwave SPX: 14.375″ heavy-walled cylinder-bore barrel with heat shield and breacher muzzle, bead sight, Raptor birdshead grip, corn-cob forend and top-tang safety. Mossberg lists 5+1 capacity, about 26.37″ OAL and about 5.75 lb. Firearm under ATF “other” / pistol-grip classification — not a Title II SBS. SPX package. Manufacturer part number: 50648.
Key features
- 12 gauge; 3″ chamber; 5+1 (6-rd class)
- 14.375″ heavy-walled barrel w/ heat shield
- Breacher muzzle; bead sight
- ~26.37″ OAL; ~5.75 lb (Mossberg)
- Raptor birdshead grip; top-tang safety
- Shockwave SPX
Buying from PM Customs in Yukon
PM Customs is a licensed FFL in Yukon, OK, serving the Oklahoma City metro. Choose local pickup by appointment (generally Mon–Sat, 8 AM–4 PM), or have your 590 Shockwave SPX shipped to your local FFL. You pick at checkout. Questions? Call 405-265-8955.






