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"High-capacity 9mm pistols built for duty and competition"
OA specializes in full-size 9mm pistols with high-capacity magazines, optic-ready slides, and modular features for duty or competition use.
Shop All OA Products46
Products
14
In Stock
-
Founded
USA
Origin
All OA Products (14)
Oa Defense 2311 Pro Elite Compact Frame 9mm Luger 21+1 4.25" Ported Barrel, DLC Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Aluminum Grip, Ambidextrous
Oa Defense 2311 Pro w/Plus Kit Compact Frame 9mm Luger 17+1 4.25" Black Ported Barrel, DLC Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Polymer Grip, Ambidextr
Oa Defense 2311 Pro Compact Frame 9mm Luger 15+1 4.25" DLC Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Polymer Grip, Ambidextrous
Oa Defense 2311 Pro Compact Frame 9mm Luger 15+1 4.25" Ported Barrel, DLC Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Polymer Grip, Ambidextrous
Oa Defense 2311 w/Plus Kit Compact 9mm Luger 17+1 4.25" Stainless Barrel, Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Polymer Grip, Ambidextrous
Oa Defense 2311 Pro Compact 9mm Luger 15+1 4.25" DLC Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Polymer Grip, Ambidextrous
Oa Defense 2311 Pro Elite Full Size 9mm Luger 21+1 5" Black DLC Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Aluminum Grip, Ambidextrous
Oa Defense 2311 Pro Elite Full Size 9mm Luger 17+1 5" Ported Barrel, Black DLC Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Aluminum Grip, Ambidextrous
Oa Defense 2311 Pro Full Size 9mm Luger 21+1 5" Black DLC Black Steel Optic Ready/Serrated Slide, Aluminum Frame w/Picatinny Rail, Black Modular Grip, RMR Footprint
Oa Defense 2311 Pro Full Size 9mm Luger 21+1 5" Black DLC Ported Barrel, Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Polymer Grip, Ambidextrous
Oa Defense 2311 Full Size 9mm Luger 17+1 5" Stainless Barrel, Black Steel Optic Ready/Serrated Slide, Black Aluminum Frame w/Picatinny Rail, Black Polymer Grip, Ambidextrous
OA Defense 2311 Pro Elite Single Action Semi-automatic Metal Frame Pistol
Oak Leaf Cluster Space Mold Accessory TPR621 860001200621
OA OA-2311-FPRO-KIT-BLK-PRT-21 9mm 5" 17+1 Black Optic-Ready Pistol
About OA
OA focuses on full-size 9mm pistols built around the 2311 platform. Their lineup emphasizes high-capacity double-stack magazines, optic-ready serrated slides, and a mix of steel, aluminum and polymer components to balance durability and weight.
Products range from standard 17 round configurations to 21 round Pro variants, offered with ported or DLC finished barrels and multiple grip and frame options. OA pistols target shooters who want a ready-to-run platform that accommodates optics, accessories, and ambidextrous controls.
Headquarters
Established
-
Country of Origin
USA
History & Heritage
OA is a firearms company known for developing the 2311 family of full-size 9mm pistols. The brand builds on modern pistol features including optic-ready slides, Picatinny-equipped frames, and high-capacity magazines to serve duty, defensive, and competitive shooters.
Notable Products
2311, 2311 Pro, and 2311 Pro Elite series full-size 9mm pistols
Why Choose OA?
Choose OA for high-capacity, optic-ready pistols that combine modern features with robust construction.
Hot OA Items June 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
Oa Defense 2311 Pro Full Size 9mm Luger 21+1 5" Black DLC Bl
$2,334.00
✓ In Stock
Oa Defense 2311 Pro Compact Frame 9mm Luger 15+1 4.25" Porte
$2,155.00
✓ In Stock
OA Defense 2311 Pro Elite Single Action Semi-automatic Metal
$2,963.00
✓ In Stock
Oa Defense 2311 Full Size 9mm Luger 17+1 5" Stainless Barrel
$1,975.00
✓ In Stock
Oa Defense 2311 Pro Compact 9mm Luger 15+1 4.25" DLC Black S
$1,706.00
✓ In Stock
Oa Defense 2311 Pro Elite Compact Frame 9mm Luger 21+1 4.25"
$2,873.00
✓ In Stock
Oa Defense 2311 Pro Elite Full Size 9mm Luger 17+1 5" Ported
$2,963.00
✓ In Stock
Oa Defense 2311 Pro Compact Frame 9mm Luger 15+1 4.25" DLC B
$2,155.00
✓ In Stock
Shop OA Products
OA Defense 2311 Pro Elite Single Action Semi-automatic Metal
$2,963.00
✓ In Stock
OA OA-2311-FPRO-KIT-BLK-PRT-21 9mm 5" 17+1 Black Optic-Ready
$2,292.00
✓ In Stock
Oak Leaf Cluster Space Mold Accessory TPR621 860001200621
$9.00
✓ In Stock
Oa Defense 2311 Full Size 9mm Luger 17+1 5" Stainless Barrel
$1,975.00
✓ In Stock
Oa Defense 2311 Pro Full Size 9mm Luger 21+1 5" Black DLC Po
$2,334.00
✓ In Stock
Oa Defense 2311 Pro Full Size 9mm Luger 21+1 5" Black DLC Bl
$2,334.00
✓ In Stock
Oa Defense 2311 Pro Elite Full Size 9mm Luger 17+1 5" Ported
$2,963.00
✓ In Stock
Oa Defense 2311 Pro Elite Full Size 9mm Luger 21+1 5" Black
$2,963.00
✓ In Stock
Oa Defense 2311 Pro Compact 9mm Luger 15+1 4.25" DLC Black S
$1,706.00
✓ In Stock
Oa Defense 2311 w/Plus Kit Compact 9mm Luger 17+1 4.25" Stai
$1,795.00
✓ In Stock
Oa Defense 2311 Pro Compact Frame 9mm Luger 15+1 4.25" Porte
$2,155.00
✓ In Stock
Oa Defense 2311 Pro Compact Frame 9mm Luger 15+1 4.25" DLC B
$2,155.00
✓ In Stock
OA News & Articles
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The Springfield Armory KUNA — a roller-delayed 9mm pistol built in partnership with Croatia's HS Produkt — has becom...
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The Strait of Hormuz: 2,500 Years of Trade, Arms, and Conflict
A twenty-one-mile-wide choke point has shaped the movement of goods — and weapons — across half the ancient and mode...
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