The M4 Viper Mk5 assault rifle from Black Ops USA is a competitive, solidly built AEG that looks great and shoots even better. With fiber optic flip up sights, a free-floating, quick release rail system, and an adjustable crane stock, this rifle is ready for battle right out of the box. With a lightweight receiver engineered for durability, and internals designed for accuracy, the M4 Viper Mk5 delivers up to 420fps with .12g BBs, and includes a 8.4v 1100mAH battery. The M4 Viper Mk5 is also a solid platform for upgrades and customization, compatible with most M4 internals and with plenty of rail space for optics, grips, lights, and other accessories.

• IMPROVED VERSION - 5TH GEN M4 DESIGN WITH FULL LENGTH ERGONOMIC HANDGUARD, durable lightweight high density polymer construction, and quick release rail system.
• PREMIUM FEATURES INCLUDING low profile fiber optic flip up sights, ambidextrous sling attachment points, adjustable crane stock with mil-spec buffer tube and more.
• LONG RANGE POWER, SHOOT UP TO 420fps with .12g BBs using the included 8.4v 1100mAH battery and charger, the Viper mk5 is also LiPo ready.
• CUSTOMIZE AND COMPETE, the Viper mk5 includes upgraded steel gears, and is compatible with standard M4 upgrades including gearbox, barrel, hop-up, motor, and more.
• SATISFACTION GUARANTEED WITH 1 YEAR WARRANTY

The M4 Viper Elite Assault Rifle from Black Ops USA is the all new upgraded version of the Viper MK5 platform. Upgrades include a metal gearbox, wishbone style metal hopup, and the aggressive full length hand guard. This is a competitive, solidly built AEG that looks great and shoots even better. With fiber optic flip up sights, a free-floating, quick release rail system, and an adjustable crane stock, this rifle is ready for battle right out of the box.

With a lightweight receiver engineered for durability, and internals designed for accuracy, the M4 Viper Elite delivers up to 360fps with .20g BBs. The M4 Viper is also a solid platform for upgrades and customization, compatible with most M4 internals and with plenty of rail space for optics, grips, lights, and other accessories.

• 5TH GEN M4 DESIGN WITH UPGRADED GEARBOX and hopup, durable lightweight high density polymer construction, and quick release rail system.
• PREMIUM FEATURES INCLUDING low profile fiber optic flip up sights, ambidextrous sling attachment points, adjustable crane stock with mil-spec buffer tube and more.
• LONG RANGE POWER, SHOOT UP TO 420fps with .12g BBs using the included 8.4v 1100mAH battery and charger, the Viper mk5 is also LiPo ready.
• CUSTOMIZE AND COMPETE, the Viper mk5 includes upgraded steel gears, and is compatible with standard M4 upgrades including gearbox, barrel, hop-up, motor, and more.
• BATTERIES NOT INCLUDED, LiPo 7.4v or NI-MH 9.6v butterfly style recommended. SATISFACTION GUARANTEED WITH 1 YEAR WARRANTY

When you pick up the SR4 you can feel the solid build quality. Upper and lower receivers, buffer tube, outer barrel, RIS rails, gas block, and flip up sights are all metal, and built to last. Even the polymer grip and Crane stock are made from solid, high impact ABS, just like the real thing.

You’ll find the same build quality and attention to detail inside the gun. This Black Ops M4 comes stock with a full metal Gen. 3 gearbox from SRC with with 8mm metal bearing bushings, metal spring guide, upgraded metal piston head, cylinder, and cylinder head, and pre-shimmed all steel gears. The hop up is metal with a newly designed wishbone style hop up arm that eliminates creep while improving consistency and range, and a new high torque, long axle motor from SRC is ready for LiPo batteries and optimized for .25g or heavier airsoft ammo.

High quality upgraded internals combined with a slightly tighter 6.06mm ID metal barrel translate to excellent performance and range. You can expect a consistent muzzle velocity over 370fps with .20g BBs, and more than 600 rounds per minute on full auto. (the exact FPS and RPM will vary with your battery and ammo).

If you want a completely custom gun, or just room to grow in the future, the Black Ops SR4 AEG is ready for anything, inside and out, compatible with most M4 internal components including spring, gearbox, motor, hop up, and barrel upgrades. You can use most standard M4 style magazines including real, mid, and hi-cap mags. The crane stock is ready for your choice of nunchuck style batteries, we recommend 9.6v NiMH or 7.4v LiPo.

The SR4 CQB Assault Rifle is perfect for anyone ready for a high quality airsoft M4 platform that’s a big step up from the competition and has room to grow. With the included one year warranty, the SR4 CQB Assault Rifle from Black Ops is a full metal AEG that you can rely on.

• SOLID BUILD QUALITY WITH FULL METAL - Upper and lower receivers, buffer tube, outer barrel, RIS rails, gas block, and flip up sights are all metal, and built to last.
• FULLY UPGRADED GEN 3 GEARBOX WITH 8mm metal bearing bushings, metal spring guide, upgraded metal piston head, cylinder, and cylinder head, and pre-shimmed all steel gears.
• LONG RANGE ACCURACY AND CONSISTENCY - Metal wishbone hop-up that eliminates creep while improving consistency and range, new high-torque long-axle motor, ready for LiPo batteries and .25g or heavier ammo.
• HIGH POWERED RANGE WITH OVER 370FPS with .20g BBs, tighter 6.06mm ID metal barrel, and more than 600 rounds per minute on full auto.
• INCLUDED 1 YEAR WARRANTY AND ACCESSORIES - M4 Diamond Back AEG, 9.6v 1600mah battery, Smart Charger, Hi-Cap 300rnd Magazine, Manual, 100 6mm BBs, Cleaning/Un-Jamming Rod