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Meprolight
Overview
The Meprolight M21T Reflex is a reliable red dot optic featuring a 12 MOA dot size, which allows for quick target acquisition while maintaining precision at various distances. Designed with a Picatinny mounting interface, it easily integrates with a wide range of AR-15 platforms. This sight is particularly popular among builders using a mid-length gas system in 5.56 NATO caliber builds, ensuring optimal performance in tactical and competitive shooting scenarios.
Based on build data

BLEM PSA AR15 Complete Classic Stealth Lower, Black
Lower Receiver
Magpul AFG-2 Angled Fore Grip - Black
Foregrip
Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Law Tactical AR Folding Stock Adapter Gen 3 - HK
Stock Adapter
Geissele Automatics Llc Ar-15 Ssa X Lightning Bow Trigger
Trigger
Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green
Charging HandleAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| BLEM PSA AR15 Complete Classic Stealth Lower, Black | Lower Receiver | 139 |
| Magpul AFG-2 Angled Fore Grip - Black | Foregrip | 86 |
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 83 |
| Law Tactical AR Folding Stock Adapter Gen 3 - HK | Stock Adapter | 65 |
| Geissele Automatics Llc Ar-15 Ssa X Lightning Bow Trigger | Trigger | 59 |
| Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green | Charging Handle | 57 |
| Platform | Percentage |
|---|---|
| AR-15 | 87.9% |
| AR-10 | 9% |
| AR-9 | 3.1% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 75.1% |
| .223 Wylde | 8.9% |
| 300 Blackout | 5.5% |
| 9mm | 2.5% |
| .308 Win | 2.5% |
| 7.62x39mm | 1.3% |
| .450 Bushmaster | 0.9% |
| 6.5 Grendel | 0.8% |
| 6mm ARC | 0.8% |
| .45 ACP | 0.6% |
| .458 SOCOM | 0.4% |
| .223 Remington | 0.2% |
| .350 Legend | 0.2% |
| .50 Beowulf | 0.2% |
| 7.62x51 NATO | 0.2% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 52% |
| Carbine | 28.5% |
| Rifle | 9.6% |
| Pistol | 8.9% |
| Blowback | 0.7% |
| Intermediate | 0.2% |
Builds in the community that include the Meprolight M21T Reflex 12MOA Tri QR Reflex Sight
| Build | Parts | Total |
|---|---|---|
![]() | 8 | $1729.64 |
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