Wednesday, February 28, 2024

Arsenal Firearms AF SWITCH 7.62x39mm and 5.45x39mm Russian Piston/Op-Rod Tactical AR Carbines with AF Streamer QD556-A and QD762-A Low-Back-Pressure Quick-Attach/Quick Detach (QA/QD) Rifle Silencer/Sound Suppressors with ‘Stream-Through’ Venting Technology! (Videos!)

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By David Crane
david (at) defensereview (dot) com

March 28, 2017
Last updated on 3/30/17.

The Arsenal Firearms AF Stryk B stiker-fired compact 9mm combat/tactical pistol certainly wasn’t the only new and interesing firearm or product DefenseReview (DR) got to view and handle at the Salient Arms International (SAI)/Arsenal Firearms (AF) booth at SHOT Show 2017–not by a long shot. While we were there, we got the chance to speak with a couple of interesting gentlemen who showed us the new AF SWITCH 7.62x39mm Russian and 5.45x39mm Russian-caliber piston/op-rod (push-type operating rod) tactical AR carbines and AF Streamer QD556-A (5.56mm NATO) and QD762-A (7.62mm NATO) low-back-pressure QA/QD (Quick-Attach/Quick-Detach) rife silencer sound suppressor system that we understand is available in both respetive calibers.

Let’s start with the Arsenal Firearms AF Switch, which was designed and developed by one Michael Brown, who was kind enough to spend some time with us and take us through the gun’s design features at the company’s booth (see DR video below). According to Brown, the guns accept standard AK (AK-47/AKM and AK-74) mags (magazines), which secure very positively, with no play. The Switch can also, according to Brown, handle any available ammo (including corrosive military ammo) and any combat-type adverse conditions, including “over the beach” salt water-and-sand conditions. We assume this is due to the combination of the piston/op-rod design and chrome-lined internal parts. The adjustable gas block has on/off capability and high and low settings for suppressed or unsuppressed/standard fire. “The first thing that’s wear out on this gun is your ammo budget”, says Brown.

The AF Switch bolt carrier group (BCG) system Brown designed and developed is ambidextrous (with charging handles sticking out both sides), and locks back after the last round. You can release the BCG by simply bumping the telescoping/retractable buttstock forward. The charging handles on the prototype Switch DR saw were reciprocating, but Brown is developing non-reciprocating charging handles, which were still in the testing stage during filming. Oh, and you can release the mag by pushing forward on the mag release lever with your index finger, or via the traditional method (see DR video below).

There are two variants of the AF Switch tactical AR carbine in each caliber, one with a standard AR-type buffer tube system, and a down-folding variant with no buffer tube that doesn’t interfere with any of the weapon’s controls. DR looks forward to seeing that.

You can get an AF Switch AR carbine with either a KeyMod or M-LOK modular rail system/tactical handguard, and there are rail extensions available, if you need more rail estate (see what we did there?).

Now, on to the Arsenal Firearms AF Streamer QD556-A and QD762-A QA/QD low-back-pressure muzzle cans (silencer/sound suppressors) designed by a design team at Finnish company Saimaa Still Oy. The Streamer cans get their name from their proprietary “Stream-Through” front venting technology, which vents gases out the front (see DR video below) to lower the back pressure and virtually eliminate “blowback”. This reduces or even eliminates hot gases and particulate matter coming back and hitting the shooter in the face, and eases weapons cleaning and maintenance, since the rifle/carbine/SBR’s (Short Barreled Rifle) internal parts don’t doesn’t get as dirty. The extremely-lowered back pressure also obviates the requirement for different gas settings on the gas block, so you can shoot suppressed or unsuppressed with the same settings. According to an email we just received from Mr. Sjogren (on 3/29/17), the QD556-A and QD762-A Streamer cans are essentially further-developed/product-improved variants of the earlier Saimaa Still AK 545L and QD762L cans, which were developed for Kalashnikov AK-47/AKM and AK-74 rifles.

The Streamer QD556-A and QD762-A rifle suppressors have superior sound suppression, and can be opened for maintenance. Some additional performance info from Harri Sjogren via email (sent on 3/29/17):

“Here are the specs of the Streamer QD556-A and QD762-A. Sound suppression QD762-A -27dB with 308 win and QD556-A -29dB with 223 rem.

QD762-A models is for all .30 rifles like 308 Win ,7.62×39 and 300 BLK.

QD556-A is for example for calibers like 223rem and 5.45×39.

Suppressor doesn’t have affect on accuracy. Point of impact (POI) changes always with suppressors because you add extra weight at the end of the barrel. Also gases which exit the suppressor will have affect on the bullet flight. With Streamer POI is very small and user can adjust the point of impact. Suppressor rotates over it own axis on the muzzle device. You can shoot and rotate the suppressor to find optimal point of impact. Point of impact will change a little bit when suppressor is rotated. In future models we will have clicks and locking so it is easy to find and lock suppressor always at the same position when you have found the optimal point of impact. This is not possible in suppressors with thread connection or QD which will not allow suppressors to rotate 360 degrees over the muzzle device.”

Bottom line, the Streamer cans are the most interesting suppressors Defense Review’s seen since the OSS Suppressors turbine design (which DR’s covered in some detail) and the JJFU Aero-Sonic Suppressor 5.56mm can aka Squash of Death, which DR’s actually shot. Anyway, the Streamer vents gases out the front (see DR video below)

Editor’s Note: While DR’s never been to Finland, we’re big fans of the Finnish military, as well as the individual military operators we’ve met so far, so we’re inclined to take whatever Finnish weaponry we encounter very seriously, including the Streamer. The product looks very good to us. We’re just waiting on the decibel-reduction numbers, as well as some accuracy and reliability/durability data. DR’s going to contact Mr. Sjogren to see what we can obtain in this regard.

Company Contact Info:

Arsenal Firearms USA
Contact Page:

Salient Arms International (SAI)
6713 South Eastern Ave
Las Vegas, NV 89119
Phone: 702.444.4458
Sales Email:

Saimaa Still Oy
Siekkilänkatu 8
50120 Mikkeli
Email Sales:
Email Support:

© Copyright 2017 (DR). All rights reserved. This material may not be published, broadcast, rewritten or redistributed without receiving permission and providing proper credit and appropriate links. If you are reading this article anywhere other than, please email us the website address/URL (where the unauthorized DR article reprint is located) at defrev (at) gmail (dot) com. Thank you.

All embedded (DR) photos and videos were shot with an Apple iPhone 6s Plus smartphone still/video camera.

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Arsenal Firearms AF SWITCH 7.62x39mm and 5.45x39mm Russian Piston/Op-Rod Tactical AR Carbines with AF Streamer QD556-A and QD762-A Low-Back-Pressure Quick-Attach/Quick Detach (QA/QD) Rifle Silencer/Sound Suppressors with ‘Stream-Through’ Venting Technology! (Videos!) by

About David Crane

David Crane started publishing online in 2001. Since that time, governments, military organizations, Special Operators (i.e. professional trigger pullers), agencies, and civilian tactical shooters the world over have come to depend on Defense Review as the authoritative source of news and information on "the latest and greatest" in the field of military defense and tactical technology and hardware, including tactical firearms, ammunition, equipment, gear, and training.

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