The KRISS Vector SBR Gen 3 9mm in Black is the most compact rifle-format Vector KRISS builds, a 9x19mm short-barreled rifle with a 5.5-inch barrel and a black finish (KRISS part no. KV90-3SBL00). The Super V system is what sets it apart: a delayed blowback mechanism that sends recoil energy down rather than straight back, so the muzzle stays flatter between shots. Gen 3 changes include an upper that accepts aftermarket pistol grips and a lower housing redesigned for comfort and control. It runs on full-size Glock magazines, ships with a 40-round magazine and handles like a much smaller gun, which is the point of a Vector SBR. At 6.4 pounds and just over two feet long with the stock collapsed, it is about as small as a rifle-format pistol-caliber carbine gets.

Key Specifications

• The chambering is 9x19mm, the most common pistol cartridge in the country.
• Barrel length is 5.5 inches (139.7 mm), short enough to keep the whole rifle handy indoors.
• Overall length is 24.25 inches collapsed and 26.2 inches extended, very compact for a shoulder-fired rifle.
• Weight is 6.4 pounds unloaded, light enough to carry and shoulder all day.
• The barrel is 4140 chrome moly steel, a tough alloy for long service life.
• Barrel finish is black nitride (QPQ), a hard surface treatment that resists wear and corrosion.
• The muzzle is threaded 1/2×28 RH, ready for a compatible muzzle device or suppressor.
• It ships with one 40-round magazine and takes full-size Glock magazines.
• The stock is the KRISS ambidextrous telescopic folding stock, which adjusts for length and folds for storage.
• The rifle wears a black finish, the classic Vector look.

Frequently Asked Questions

Does the black model differ from the other colors? Only in finish. KRISS lists the same barrel, stock, trigger and operating system across the Gen 3 SBR colors.

What magazines does the 9mm Vector SBR use? It feeds from full-size Glock magazines in 9mm, and KRISS includes one 40-round magazine.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

Buy the KRISS Vector SBR Gen 3 9mm 5.5-Inch, Black

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through KRISS‘s short-barreled rifles lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.