Rock Island Armory VRBP-100 12 Gauge Bullpup Shotgun, 20-inch

The Rock Island Armory VRBP-100 (part no. VRBP100A) is a 12 gauge magazine-fed semi-automatic bullpup shotgun built by Armscor for shooters who want serious firepower in a compact package. Its polymer stock sits directly behind the action rather than out front, keeping the overall gun as short as possible without sacrificing barrel length or capacity. A 20-inch contoured barrel and a durable anodized finish make it a practical choice for both hunters and home defenders, and it accepts the widely available VR-series magazines for quick reloads. Rubber spacers on the stock let a shooter adjust length of pull to fit their build.

Key Specifications

• The bullpup layout places the polymer stock directly behind the action for a short overall package.
• Chambered in 12 gauge, cycling both 2-3/4-inch and 3-inch shells.
• A 20-inch contoured barrel balances a compact footprint with a useful sighting plane.
• Holds a 5+1 capacity and accepts widely available VR-series magazines for quick reloads.
• Overall length measures just 32 inches, with a width of 2 inches and a height of 7 inches.
• The shotgun weighs approximately 7.94 pounds empty and about 8.82 pounds loaded.
• A durable anodized finish in matte black resists everyday handling wear.
• The barrel accepts Mobil-pattern choke tubes for versatility across loads.
• Rubber spacers on the polymer stock allow the length of pull to be adjusted to fit the shooter.

Frequently Asked Questions

What magazines does the VRBP-100 use? It accepts widely available VR-series detachable box magazines for a 5+1 capacity.

Can the stock be adjusted to fit different shooters? Yes, rubber spacers on the polymer stock allow the length of pull to be adjusted.

What chamber size does it accept? It cycles both 2-3/4-inch and 3-inch 12 gauge shells.

Buy the Rock Island Armory VRBP-100 Shotgun

For shooters who want a magazine-fed 12 gauge without the length of a traditional shotgun, the VRBP-100’s bullpup design delivers real firepower in a genuinely compact package. Order it from Armscor/Rock Island Armory‘s lineup of semi-auto shotguns through our Lubbock, Texas gun shop for fast, insured shipping to your FFL.