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Ar-15/M16 Flattop Riser - Ar-15/M16 Flattop Riser Assembly
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SKU: 080000506
Overview
Designed for mounting optics on a flattop AR-15 receiver, this riser positions a primary sight higher to help bring the optic into a more natural eye line. It accepts both Picatinny and Weaver-style rings, giving you flexibility when setting up a rifle for hunting or range use. The full-length clamping bar and slotted hex nuts are intended to secure the riser firmly to the receiver rail, while the streamlined underside keeps the profile clean. For shooters who want added height without moving to extra-high rings in most setups, it offers a practical mounting solution.
Why Hunters Choose the Brownells
Raises Optical
Sights to eye level for
Adds .75
Inch height to flattop AR-15
True Picatinny
Cut accepts both Picatinny and
Full-length Clamping
Bar secures the riser to
Slotted Hex
A U.S. quarter
Key Features
- Raises optical sights to eye level for quicker, more precise target acquisition.
- Clamps to a flattop AR-15 receiver for secure optic mounting.
- Adds .750 inch of mounting height, reducing the need for extra-high rings in most applications.
- True MIL-STD 1913 Picatinny cut accepts Picatinny and Weaver-style rings.
- Two slotted hex nuts can be tightened with a U.S. quarter for added leverage.
- Full-length clamping bar and precision CNC machining help lock the riser securely to the receiver rail.
Best Used For
- AR-15/M16 owners mounting primary optics on a flattop receiver and needing added sight height
- Shooters using Picatinny or Weaver-style rings who want a riser with broad compatibility
- Users who prefer a secure clamp-on setup for a flattop rail without extra-high rings
- Hunters or tactical shooters wanting a raised optic position for quicker target acquisition
- Anyone seeking a matte-black, low-profile riser assembly for a streamlined AR setup
Specifications
| Added Height | .75" (1.9cm) |
|---|---|
| Blade Finish | hardcoat anodized, matte black |
| Clamping Bar | Full-length clamping bar |
| Clamping Hardware | Two slotted hex nuts |
| Compatibility | Accepts both Picatinny and Weaver-style rings |
| Height | .975" (2.45cm) high overall |
| Length | Approximately 5" (12.7cm) |
| Material | 6061 T6 aluminum |
| Mounting Type | Clamps to flattop AR-15 receiver |
| Rail Type | True MIL-STD 1913 Picatinny cut |
| Tool Use | U.S. quarter can be used for extra tightening leverage |
| Weight | 4.8 oz. (136 g) |
| Width | 1" (2.5cm) at the base |
Pros
- Raises optical sights to eye level for quicker target acquisition
- Adds .75 inch height to flattop AR-15 receivers
- True Picatinny cut accepts both Picatinny and Weaver-style rings
- Full-length clamping bar secures the riser to the receiver rail
- Slotted hex nuts allow extra tightening leverage with a U.S. quarter
- Precision CNC machining supports a secure lock on the receiver rail
Considerations & Trade-offs
- Adds 0.75" of height to a flattop receiver, so it changes optic placement and may require checking sight height before setup.
- Designed for flattop AR-15 receivers; it is not a universal mount for other platforms or rail configurations.
- The 1913 Picatinny cut accepts Picatinny and Weaver-style rings, but compatibility still depends on the specific optic and ring setup.
- At 4.8 oz., it adds noticeable weight to the rifle compared with a direct-to-receiver mount.
Suggested Comparisons
- AR-15 optic risers
- Picatinny scope mounts
- Weaver-style ring mounts
- Flattop receiver accessories
Suggested Accessories
- Picatinny-compatible optic rings
- Weaver-style optic rings
- Optic mounting hardware
- Lens covers
Frequently Asked Questions
What does this riser do on a flattop AR-15/M16 receiver?
It clamps to a flattop AR-15 receiver and raises primary optic sights to eye level. The listed height increase is .75" (1.9 cm).
Will it accept both Picatinny and Weaver-style rings?
Yes. The description says it has a true MIL-STD 1913 Picatinny cut that accepts both Picatinny and Weaver-style rings.
How does it secure to the receiver?
It uses a full-length clamping bar and two slotted hex nuts for tightening. The description also notes the nuts can be tightened with a U.S. quarter for extra leverage.
What material and finish are listed for this riser?
The provided specs list 6061 T6 aluminum with a hardcoat anodized, matte black finish.
What are the listed dimensions and weight?
The specs list it at approximately 5" (12.7 cm) long, 1" (2.5 cm) wide at the base, .975" (2.45 cm) high overall, and 4.8 oz. (136 g) in weight.