AT3 Barrel Builder Kit – 16″ 5.56 NATO Pencil Profile Mid-Length Barrel, Gas Block, Gas Tube & BCG

AT3 Barrel Builder Kit – 16 Inch 5.56 Pencil Barrel, Gas Block, Gas Tube, and BCG

Features

• Includes the barrel, gas system, and bolt carrier group for a lightweight 16 inch 5.56 NATO AR-15 upper build
• Built around an AT3 16 inch 5.56 NATO pencil profile barrel with a mid-length gas system
• Includes a low-profile .625 steel gas block, mid-length stainless gas tube, and two gas tube roll pins
• Includes a complete AT3 black nitride bolt carrier group for 5.56 NATO and .300 Blackout
• Good fit for builders who want a lighter front end than a government profile barrel setup

The AT3 Barrel Builder Kit gives you the core parts for building out the barrel, gas system, and BCG side of a lightweight 5.56 NATO AR-15 upper. This kit pairs a 16 inch pencil profile mid-length barrel with a matching .625 low-profile gas block, stainless mid-length gas tube, two gas tube roll pins, and a complete black nitride BCG.

Note: This kit is not assembled. Upper receiver, handguard, charging handle, muzzle device, and small installation tools are not included.

Specifications

• Brand: AT3 Tactical
• Model: Barrel Builder Kit – 16 Inch 5.56 Pencil Mid-Length with BCG
• MPN: AT3-BBKIT-16-556-PEN-MID-GB-GT-BCG
• Platform: AR-15
• Caliber: 5.56 NATO
• Barrel Length: 16 inches
• Barrel Profile: Pencil
• Gas System Length: Mid-Length
• Gas Block Journal: .625 inch
• BCG Finish: Black Nitride

What’s Included

• 1x AT3 5.56 NATO Pencil Profile 16 Inch AR-15 Barrel
• 1x AT3 Low Profile Micro Steel AR-15 Gas Block – .625
• 1x AT3 AR-15 Gas Tube – Stainless – Mid-Length
• 1x AT3 AR-15 Bolt Carrier Group – 5.56 NATO/.300 Blackout – Black Nitride
• 2x AT3 AR-15 Gas Tube Roll Pin