Specna Arms SA-F04 Gen 2 Flex AEG Airsoft Rifle Field Test Review
In this field test, we put the Specna Arms SA-E04 AR15 AEG through its paces, focusing on its chronograph consistency and accuracy performance in both semi-automatic and full-automatic modes.
If you haven't already, be sure to check out the detailed table-top review where we cover the technical specifications, build quality, and close-up features of this highly affordable AR-styled Airsoft rifle.
Chronograph Testing
For this test, we utilized heavier 0.25g Airsoft BBs rather than standard 0.20g rounds.
Shot 1: 363 FPS
Shot 2: 362 FPS
Shot 3: 363 FPS
Shot 4: 363 FPS
Shot 5: 362 FPS
Chronograph Verdict
The velocity consistency on this rifle is incredibly impressive, varying by only a single foot per second across consecutive shots. While 0.25g BBs clocked in around the 362–363 FPS mark, switching to standard 0.20g BBs will easily push this rifle well into the 400 FPS range.
Note on Compliance: The legal limit for an airsoft gun to be imported into Canada requires it to exceed 366 FPS with a 0.20g BB. Because this rifle clears that floor easily with heavier ammunition, it comfortably complies with Canadian import guidelines.
(Note: The SA-E04 includes an optional, lighter replacement spring in the box if you need to lower the velocity for local indoor CQB field limits).
Accuracy Testing
We set up a paper target at a distance of 30 feet to observe grouping behavior under a controlled, seated position.
Semi-Automatic Accuracy (10-Shot Group)
The initial 10-shot semi-automatic string produced a very respectable 1.5-inch grouping. The Specna Arms SA-E04 AR15 AEG grouped tightly and predictably, making it more than capable for indoor CQB fields or mid-range outdoor skirmishes.
Full-Automatic Accuracy (Burst Test)
Switching over to full-automatic, we sent a heavy volume of fire downrange (approx. 50 to 70 rounds). The mechanical grouping stayed reasonably tight at roughly 2 inches, though the placement shifted vertically.
Sight Alignment & Out-of-the-Box Adjustments
During the shooting test, the rifle consistently grouped low relative to the center mass of the target, striking about 8 to 9 inches below the point of aim.
Plaintext
[ Aim Point ] --> o (Top of Target)
|
| ~8-9 Inches Low
v
[ Impact Point ] --> X (Actual Grouping)
How to Correct It
Because the Specna Arms SA-E04 AR15 AEG shoots low out of the box, the iron sights require basic mechanical adjustment:
To raise the point of impact, you must lower the front sight post.
Lowering the front sight forces you to naturally elevate the barrel when aligning your sight picture, bringing the actual point of impact up to match your point of aim.
Alternatively, the top Picatinny rail makes it incredibly easy to bypass the stock iron sights entirely by mounting a red dot or optical sight.
Final Thoughts & Availability
For a bare-bones, budget-friendly Airsoft rifle, the Specna Arms SA-E04 is a durable, lightweight, and remarkably consistent performer. It offers out-of-the-box velocity stability that rivals much more expensive options, making it an excellent platform to build on.
Canada Customers: You can find this model directly in our Replica Airguns Canada Store.
US Customers: Check out the Replica Airguns US Store for available inventory on this model or similar AR15-styled airsoft alternatives.
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