Bolt Airsoft is well known because of their electric blow back system called B.R.S.S. System. We tested their first BOLT M4A1 model and were enthousiastic, now they release their second model the B4 SOPMOD! Guess what, we will review it again for you guys!

For now continue reading to check our the gallery and all new features and specs of this new Bolt Airsoft model!

SOPMOD Specs

• Built Material: Aluminum/ABS, Nylon & Glass Fiber and Steel
• Shooting Modes: Semi, Full-auto
• Magazine Capacity: 300rnd
• Length: 767mm-851mm
• Weight: 2850g
• Hop-up: Adjustable
• Blow-back: Yes, Recoil shock B.R.S.S system
• Power: 95m/s(312fps) and 120m/s(393fps)
• Power Source: 7.4V22C(Li-Po) or 11.1V15C(Li-Po) or 9.6V(Ni-mh or Ni-Cd)

Newest SOPMOD Features

• One-pieced outer barrel
• Accurate inner barrel (6.0mm)
• New Hop-up and bolt plate unit
• Well-finished tactical rail
• Rear wire connection
• Stronger BOLT Gear Sets