21ST Tec Tec GIII 308 Win 16" Barrel 20+1 Capacity

G3 Magazines

AVAILABLE AT DR GUN SUPPLY
12360 N MACARTHUR BLVD
OKLAHOMA CITY, OKLAHOMA

Store Hours:
Monday 12-6PM
Tuesday-Friday 10-6PM
Saturday 10-2PM
Sunday CLOSED

The TEC-GIII rises to meet the demands of both enthusiasts and professionals by integrating the proven functionality
of G3 magazines with the familiar and trusted components of the AR10 platform.

Featuring a Direct Impingement (DI) system, the TEC-GIII is available with a choice of barrel lengths: a
16-inch option chambered in .308/7.62 NATO with a 1:10 twist for balanced maneuverability, or a 20-
inch variant with a 1:8 twist chambered in 6.5 Creedmoor for long-range precision. The rifle’s receivers
are precision-machined from Billet T6 Aircraft Aluminum, ensuring a solid foundation for sustained
durability. An adjustable gas block enables the rifle to be tuned for suppressor use, while the controls
adhere to the standard safe and semi-automatic settings for user familiarity.
The TEC-GIII caters to operator comfort with a Mil-Spec buffer tube, a 6-position adjustable CCS Carbine
stock, and a THRIL RTG grip, allowing for a customized fit. A 15-inch M-LOK handguard, featuring an
integrated MIL1913 Rail, offers ample space for accessories. The rifle’s balance is optimized with a
weight of 8.5lbs and an adjustable overall length from 35 to 39 inches, providing a comfortable and

adaptable shooting platform. Additionally, the TEC-GIII is fitted with a Nickel Boron Trigger for a smooth,
consistent pull and a Flash Hider with 5/8x24 muzzle threads.

PARTS compatibility list with DPMS pattern LR308/AR10 Rifles:
- Firing Pin
- Bolt Assembly
- Cam Pin
- Gas Key
- Dust Cover
- Forward Assist
- Charging handle
- High Rail/Handguard/Barrel Nut
- Lower Parts Kit
- Mil-Spec Carbine buffer tube assembly, buffer and recoil spring for .308

• MANUFACTURER: 21ST TEC
• FAMILY: AR10
• MODEL: Tec GIII
• TYPE: Rifle
• ACTION: Semi-Automatic
• CALIBER/GAUGE: 308 Win
• BARREL: 16"
  • CAPACITY: 20 Round