Contact Us Tel:(626) 286-0360 Store Locations
NEW Phone Support Hours M-F 7am-6pm PST
Browse by Type or Category
Airsoft Season is Back! Use code SPRING2019 for 25% off! (Sale/MAP items exempt, click for Details)

Matrix M4 GBB AR-15 Gas Blowback Airsoft Rifle w/ Reinforced WA System by S&T (Model: Delta Keymod 13")

ID: 81101 (GR-MTX-ST-GBB-12-ABK)
4.9 stars, based on 12 reviews
Matrix M4 GBB AR-15 Gas Blowback Airsoft Rifle w/ Reinforced WA System by S&T (Model: Delta Keymod 13)
Hover or touch above to zoom
Optics not included
Youtube preview Product image 1 Product image 2 Product image 3

$185.00 $149.00


  • Utilizes the Western Arms gas blowback system ensuring reliable performance with a plethora of aftermarket parts and accessories
  • Injection molded polymer receiver provides rugged durability without the additional weight of a metal receiver
  • Improved gas efficiency, reliable feeding and firing in full auto
  • Adjustable SOPMOD type stock
  • Flat top receiver is ideal for mounting optics or other 20mm accessories
  • 20mm railed Keymod compatible handguard with Keymod mounting points on the 2 O'Clock, 6 O'Clock, and 10 O'Clock positions
Length: 765mm-855mm, Adjustable
Weight: 3300g
Inner Barrel: ~363mm
Magazine Capacity: 50rds Uses Matrix, G&P, Western Arms, King Arms, Inokatsu, and compatible magazines.
Muzzle Velocity: 340~380 FPS (Measured with 0.20g BBs and Green Gas)
Thread Direction: 14mm Negative
Gas Type: Green Gas
Fire Modes: Semi/Full-Auto, Safety
Package Includes: Gun, Magazine
Hopup: Yes, Adjustable

Manufacturer: Matrix. (USA) S&T (Asia)

FPS Range: 340-380

About Matrix

Established in 2001 for Airsofters by Airsofters. Team Matrix thrive on the vision to better the sport of Airsoft with affordable high quality Airsoft equipment. With decades of experiences as Airsoft enthusiasts ourselves, we live, sleep, and breathe Airsoft. Matrix offers a wide selection of skirmish grade replicas from rifles to pistols, a wide variety of accessories, and tactical equipment from helmets to boots. It is the Matrix mission to prepare every Airsoft shooter the perfect experience!

About S&T

S&T is a group of Airsoft enthusiasts that produces rifles and parts based on the trends in the Airsoft industry. Their mission is to supply a wide range of quality products with the most competitive pricing for dealers and consumers alike. S&T was founded in 2009 with their HQ office located in Hong Kong, a subsidiary office in Japan, as well as Airsoft / Airgun manufacturing facilities in China.

12 Customer Reviews

(Write a review)

by scott t. on 03/22/2019
"I just purchased a mystery box and recived this gun and upon receiving it and going over it and test firing it I'm very pleased with my purchase I have plenty of other weapons I've purchased through evike and have been looking for something I can do a sniper gas mood to and this us perfect a++ as always
I also have the 150 dollar model of this I have done a marksman build with so once again a++ guys
by Donald K. on 03/22/2019
"The CQB-R variant is my first ever GBBR, and I love it. It’s super cheap and gets the job done. It fires way over 350 FPS (my cqb arena’s limit) at around 380-390 for the first 10 or so shoes after a fresh refill of green gas, but dips down to 330 after that. However the upper, lower, pistol grip, and stock are all plastic, but the buffer tube and RIS are metal.
by Niki v. on 12/05/2018
"First let me preface: I am new to GBB and Airsoft. This is the first airsoft gun I have bought from evike and the only real airsoft battle I have been in is with some spring guns. so label this review as about the gun. I bought the M16A4 and its awesome. I have shot a real Ar15 and i know what a real guns recoil feels like so im coming
at GBB with a higher standerd

Has Good Range(40 yds)
pretty accurate
looks awesome
Rate of fire (really high and sounds cool)
realistic take down

When you shoot it the gun makes a weird springy sound
Rate of Fire is a little high for me you can unload a full mag in 5-6 seconds

Questions, Answers and Comments

Discuss about Matrix M4 GBB AR-15 Gas Blowback Airsoft Rifle w/ Reinforced WA System by S&T (Model: Delta Keymod 13) with your friends and fellow shoppers!

Comment or answer questions for a chance to win awesome prizes. Details can be found on the Facebook page. Remember to check "Also post on Facebook" when commenting to qualify for the giveaways!

Have an urgent question about this item? We monitor these comments daily, but it may be faster to email us directly or call us at (626) 286-0360. Our resident experts are standing by to answer your questions!

California Proposition 65 Warning: Cancer and Reproductive Harm -

Search tags for related products