Magpul AR-15 Barrel Extension Block - MAG536
Click to see full view
Magpul
Overview
The Magpul AR-15 Barrel Extension Block is designed for use with a 15-inch M4 profile barrel chambered in 5.56 NATO. This component provides a stable and secure connection point for the barrel, ensuring proper alignment and function within the upper receiver. It is commonly found in builds focused on precision shooting and tactical applications, where reliability and performance are essential.
Specifications
Available Merchants(9)
Prices checked
Price Alert
Price and stock
Availability is good for the Magpul AR-15 Barrel Extension Block - MAG536: it was in stock at one retailer or another nearly every day in September 2026, and today 7 of the 9 retailers we track have it in stock. It dipped to $33.99 at KY Gun Company for a stretch in September 2026, well under its usual $42.71, so sales do come around. Buying today, the lowest price is $33.99 at KY Gun Company, which matches the best price we saw in September.
Prices checked · refreshed daily across 37 retailers
Not sure which barrel to pick?
We ranked every barrel by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
Frequently Built With
Popular alongside barrels on GunPartPicker
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
Maximize Your AR-15's Potential with Tacfire's 15" ACE M-LOK Handguard - Black Excellence - HG20-15
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Bravo Company M16 Bolt Carrier Group Black
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
No reviews yet. Be the first to review this product!