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Arisaka Defense
The Arisaka Defense Plate #12 is a tall-height optic mounting plate designed for shooters running larger scope turrets or higher-magnification optics on their AR15 rifle. This plate is part of Arisaka's modular offset optic mount system, which lets you mount a red dot sight at a 35 or 45 degree offset without buying additional components. The Plate #12 specifically fits the Aimpoint Acro and works with the Arisaka base to achieve the proper co-witness height for scope mounts measuring 1.9" to 2.2" tall—ideal when you need extra clearance around wider turrets or taller glass.
Arisaka's offset mounting approach solves a real problem on modern tactical and hunting builds: getting a quality close-quarters optic to sit cleanly above a full-size scope without interference. When you cant the rifle slightly to use the offset red dot, the Arisaka system keeps your primary optic centered over the bore and maintains lower 1/3 co-witness. The base and plates are fully reversible, so you can swap sides without additional hardware, and each component is sold separately—giving you flexibility to upgrade or expand your setup as your gear collection grows.
Built from 6061-T6 aluminum and finished with MIL-A-8625 Type III hard coat anodization, the Plate #12 is tough enough for duty and field use. The entire system is CNC machined for tight tolerances. At 1.9 oz (base only), it adds minimal weight to your upper receiver.
| Plate Model | Plate #12 |
| Height Range | 1.9"–2.2" scope mounts |
| Compatible Optic | Aimpoint Acro |
| Material | 6061-T6 aluminum |
| Finish | MIL-A-8625 Type III hard coat anodized |
| Base Weight | 1.9 oz (without optic) |
| Base Length | 1.0" (occupies 3 Picatinny slots) |
| Base Height Above Rail | 0.180" |
| Mounting Interface | Picatinny rail (AR15) |
The Plate #12 is designed specifically for the Aimpoint Acro. Arisaka offers different plates for other popular red dots—Plate 8 for Trijicon RMR/SRO and Holosun 407C/507C/508T, Plate 11 for Aimpoint Micro T-series and SIG Romeo 4/5, and others—so you'll want to verify you have the right plate for your optic.
Plate #12 is a tall-height variant designed for scope mounts in the 1.9" to 2.2" range. The standard-height plates work with smaller 1.5" to 1.8" scope mounts. Choose based on the height of your primary magnified optic to ensure proper clearance and co-witness.
The Plate #12 is sold as the optic plate only. You will need to purchase the Arisaka base separately if you don't already have one. The base and plates are modular, so you can mix and match as your setup evolves.
Yes. The Arisaka system allows you to reverse both the base and optic plates for left or right side mounting without needing additional components.
Arisaka Defense
The Arisaka Defense Plate #12 is a tall-height optic mounting plate designed for shooters running larger scope turrets or higher-magnification optics on their AR15 rifle. This plate is part of Arisaka's modular offset optic mount system, which lets you mount a red dot sight at a 35 or 45 degree offset without buying additional components. The Plate #12 specifically fits the Aimpoint Acro and works with the Arisaka base to achieve the proper co-witness height for scope mounts measuring 1.9" to 2.2" tall—ideal when you need extra clearance around wider turrets or taller glass.
Arisaka's offset mounting approach solves a real problem on modern tactical and hunting builds: getting a quality close-quarters optic to sit cleanly above a full-size scope without interference. When you cant the rifle slightly to use the offset red dot, the Arisaka system keeps your primary optic centered over the bore and maintains lower 1/3 co-witness. The base and plates are fully reversible, so you can swap sides without additional hardware, and each component is sold separately—giving you flexibility to upgrade or expand your setup as your gear collection grows.
Built from 6061-T6 aluminum and finished with MIL-A-8625 Type III hard coat anodization, the Plate #12 is tough enough for duty and field use. The entire system is CNC machined for tight tolerances. At 1.9 oz (base only), it adds minimal weight to your upper receiver.
| Plate Model | Plate #12 |
| Height Range | 1.9"–2.2" scope mounts |
| Compatible Optic | Aimpoint Acro |
| Material | 6061-T6 aluminum |
| Finish | MIL-A-8625 Type III hard coat anodized |
| Base Weight | 1.9 oz (without optic) |
| Base Length | 1.0" (occupies 3 Picatinny slots) |
| Base Height Above Rail | 0.180" |
| Mounting Interface | Picatinny rail (AR15) |
The Plate #12 is designed specifically for the Aimpoint Acro. Arisaka offers different plates for other popular red dots—Plate 8 for Trijicon RMR/SRO and Holosun 407C/507C/508T, Plate 11 for Aimpoint Micro T-series and SIG Romeo 4/5, and others—so you'll want to verify you have the right plate for your optic.
Plate #12 is a tall-height variant designed for scope mounts in the 1.9" to 2.2" range. The standard-height plates work with smaller 1.5" to 1.8" scope mounts. Choose based on the height of your primary magnified optic to ensure proper clearance and co-witness.
The Plate #12 is sold as the optic plate only. You will need to purchase the Arisaka base separately if you don't already have one. The base and plates are modular, so you can mix and match as your setup evolves.
Yes. The Arisaka system allows you to reverse both the base and optic plates for left or right side mounting without needing additional components.
