Primary Arms SLx MD-21S Micro Dot Red Dot Sight 2 MOA Matte Black
All Primary Arms optics
Click to see full view
Primary Arms
Overview
The Primary Arms SLx MD-21S Micro Dot Red Dot Sight 2 MOA Matte Black is a optic. Compare prices from multiple merchants and find the best deal.
Specifications
Primary Arms SLx MD-21S Micro Dot Red Dot Sight 2 MOA Matte Black
Price and stock
Availability is good for the Primary Arms SLx MD-21S Micro Dot Red Dot Sight 2 MOA Matte Black: it was in stock at one retailer or another nearly every day in September 2026, but today only KY Gun Company has it in stock. It dipped to $152.99 at MidwayUSA for a stretch in September 2026, well under its usual $179.99, so sales do come around. Buying today, the lowest price is $179.99 at KY Gun Company, above September's low of $152.99, so a better deal may come back.
Prices checked · refreshed daily across 37 retailers
Not sure which optic to pick?
We ranked every optic by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Red Dot & Optic Guide →Check it against the live catalog:
Frequently Built With
Popular alongside optics on GunPartPicker
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
Bravo Company Manufacturing 5.56 NATO Mid-Length Bhf AR-15 Barreled Upper - MCMR-15 - 16"
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
Bravo Company M16 Bolt Carrier Group Black
No reviews yet. Be the first to review this product!