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Meprolight
Overview
The Meprolight MEPRO M21 is a reflex sight that features a 4.3 MOA red dot reticle, making target acquisition quick and intuitive in various lighting conditions. This sight is designed for both day and night use, providing a versatile aiming solution for builders looking to enhance their AR-15 builds. It is commonly found in carbine gas system configurations chambered in 5.56 NATO, catering to those who prioritize reliability and ease of use in their optics.
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% |
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