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Home » Accessories & Parts » External Parts » Barrel Extensions

APS M4 CQB-R Convertible Barrel Adapter / Extension Set (Thread: 14mm- Negative)

ID: 27518 (BRL-3EXT-SET)
AA042
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MatrixAPS

$25.00

Thread Options:
Thread14mm- Negative

Description

Reviews

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Features

  • Aluminum alloy construction
  • Matte black finish
  • Short, medium and long sections allow for customizable barrel length
  • 14mm barrel threads
Included Lengths: .75", 1.6", and 3.75" (21mm, 41mm, and 96mm)
Compatibility: 14mm threaded barrels
Material: Aluminum Alloy

Manufacturer: APS

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 APS

APS Limited, formerly known as APS Airgun Ltd was established in 2001. APS started by specializing in designing and building Simulation Training Equipment (Real Action Markers & Powder Balls for training simulation). APS - the three words stand for Accuracy - Pneumatics - Shooting. With their knowledge and experience that has been gained from making Real Action Markers and Projectiles, APS launched a new product line - Electronic Blow Back (EBB) products to spur the current Airsoft Market. Since entering the Airsoft industry their line of Airsoft rifles, pistols and accessories have been incredibly popular.

21 Customer Reviews

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by James P. on 05/23/2025
"These adapters are very lightweight aluminum so use caution with the leading threads. This lightweight-ness is helpful for limiting the out front weight. In comparison a steel adapter would have more durable threads but every out front ounce adds up. The coating is a nice matte black and not overly thick so the threads are all tidy. I tested a few random inner barrels and all fit through these adapters just fine. The outer diameter is 18.75mm (0.738").
The listed lengths are the extending length and NOT the overall length. Threaded sections are all around 13.5mm (0.531") proud. Some barrel washers between your outer barrel and the adapter might help squeak out some extra extending if you have to clear a rail end just a bit more.
The smaller 21mm extension will extend your outer barrel 21.2mm (0.833") - overall is 35.2mm (1.384").
The medium 41mm extension will extend your outer barrel 41.1mm (1.620") - overall is 55.1mm (2.171").
The longer 96mm extension will extend your outer barrel 96.2mm (3.788") - overall is 110.25mm (4.339").
by Arthur V. on 05/17/2025
"This are solid! very good, only problem is that if u screw it all the way in that thing is not unscrewing lol.
by Grant P. on 07/18/2021
"I bought these to lengthen the barrel of my M4 CQB so I could use a tracer. The metal these are made of, is kind of soft. Though, as long as you don't cross thread them. They will do what they are meant to do, and do it very well. One thing to note is that you will want to thread them on to each other several times before individual use. The paint that is used on the threads can get in the way some times. So screwing them together will rub that off. Other than that, I like them and they work as advertised.

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