Luth-AR A2 Rear Sight Assembly Kit Iron Sight
Luth-AR
$75.15
(No reviews yet)
Write a Review
Luth-AR
Luth-AR A2 Rear Sight Assembly Kit Iron Sight
The Luth-AR A2 Rear Sight Assembly Kit delivers a complete, mil-spec-inspired iron sight solution for AR-15 builders and upgraders who demand reliable, field-proven accuracy from their A2 upper receiver.
- Complete kit includes every component needed for full A2 rear sight assembly
- Precision windage knob and pin allow repeatable, tool-free lateral adjustments
- Dual-aperture design offers quick transitions between 0–200m and 300–800m settings
- Heavy-duty flat spring and ball bearings ensure positive, click-detent elevation indexing
- Elevation index marked 8/3 for accurate battle-sight zero at standard AR ranges
- Manufactured by Luth-AR, a trusted name in American-made AR-15 components
Who This Is For
This kit is ideal for AR-15 enthusiasts completing a scratch build on an A2 upper receiver, gunsmiths restoring a classic A2-configuration rifle, or shooters who prefer the simplicity and durability of traditional iron sights over optics. It suits anyone who wants a dependable, budget-friendly backup sight system or a primary sighting solution for range work and training.
Specifications
| Brand | Luth-AR |
|---|---|
| Part Number | LUTHUR-21K |
| Compatibility | A2 Upper Receiver (AR-15/M16) |
| Aperture Type | Dual – Short Range (L) / Long Range (0–800m) |
| Elevation Index | 8/3 Rear Base Index |
| Included Components | 9 parts (base lug, aperture, springs, knob, pin, ball bearings, screw) |
| Assembly Required | Yes |
| Material | Steel |
| Finish | Matte Black |
| Country of Origin | USA |
Frequently Asked Questions
Will this A2 rear sight kit fit my AR-15 flat-top (Picatinny rail) upper receiver?
No — this kit is specifically designed to mount on an A2 carry-handle upper receiver, which has a dedicated rear sight housing integrated into the carry handle. It is not compatible with flat-top uppers that use a Picatinny rail (MIL-STD-1913). If you have a flat-top upper, you would need a separate rear sight designed to clamp onto a rail.
Does this kit come pre-assembled, or do I need tools to put it together?
This is a component kit that requires assembly. All nine individual parts are included — including the windage knob, windage pin, ball bearings, springs, and aperture — but you will need to assemble them into your A2 upper receiver's sight housing. Basic gunsmithing tools and a roll pin punch set are recommended for proper installation.
What is the "8/3" elevation index marking on this rear sight?
The 8/3 elevation index refers to the battle-sight zero settings standard to A2-style rear sights. The "8" setting is used for a 25-meter zeroing distance that corresponds to a 300-meter zero, while the "3" setting is used for targets at 300 meters when zeroed at 25 meters. This dual-position system allows shooters to quickly adapt their zero to different engagement distances without tools.
