KWA KM4 SR7 AEG
Short barrel, free-float rail, built for close quarters
The KWA KM4 SR7 is a short-barreled 6mm AEG airsoft rifle built for close quarters. It is the same size as the KM4 CQB, shoots 340–360 FPS in semi and full auto on KWA’s AEG 2 gearbox, and has a free-float Picatinny rail for grips and lights. It comes with one K120 120-round magazine and an orange muzzle brake.
Looking for one today?
The KM4 SR7 is out of stock right now. These KWA models are the closest match today.
KWA Rewards
Earn 300 points on this item, worth $6.00 in store credit. New members get 100 points for signing up and 500 bonus points on their first order.
How KWA Rewards worksPay over time
Split it into 4 interest-free payments of $75.00 with Klarna, or pay over time with Affirm. Choose either at checkout.
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This item ships free, since orders over $200 ship free in the contiguous US.
Shipping detailsKlarna and Affirm are subject to approval. See payment terms. A higher initial payment may be required for some consumers. CA resident loans made or arranged pursuant to a California Financing Law license.
What is the KM4 SR7?
The SR7 is built on the KM4A1 platform with a shorter barrel, so it is the same size as the KM4 CQB and easy to move with indoors.
Its free-float Picatinny rail takes foregrips, lights and other gear. Full metal alloy construction and the proven AEG 2 gearbox keep it durable.
- AEG 2 gearbox, electronic trigger ready
- Free-float Picatinny rail
- Built on the KM4A1 platform
- Same size as the KM4 CQB
- Full metal alloy construction
- Adjustable hop-up
- KWA Crane stock
- Takes K120 magazines
KM4 SR7 Features
Free-Float Rail
Mount foregrips and lights.
CQB Size
10.75-inch outer barrel, 28 inches retracted.
AEG 2 Gearbox
Proven for long-lasting durability and strength.
KM4 SR7 Specifications
| Performance | |
|---|---|
| Power system | AEG 2 gearbox |
| Velocity | 340–360 FPS |
| Rate of fire | 14+ rounds per second |
| Firing modes | Safe, semi-auto, full auto |
| Magazine | K120 included, 120 rounds |
| Hop-up | Adjustable |
| Motor | KWA high torque motor |
| Electronic trigger | Ready |
| Battery | NiMH or Li-Po/Li-Fe, Tamiya connector (2020 version) (not included) |
| Dimensions | |
| Length | 28 in retracted, 31.25 in extended |
| Outer barrel | 10.75 in |
| Inner barrel | 10.75 in |
| Weight | 6.79 lb |
| Build | |
| Platform | SBR |
| Rail | 6.13-inch Picatinny rail, free-float |
| Stock | KWA Crane stock |
| Muzzle | A2 birdcage |
| Body | Full metal alloy |
Which magazines fit? See the KWA magazine compatibility chart.
What comes with the KM4 SR7
How the KM4 SR7 works
Which magazines to use
The KM4 SR7 comes with one KWA K120 120-round mid-cap. Spare K120s come in 6-packs, For a bigger load, the K400 holds 400 rounds.
Ready for an electronic trigger
KWA lists the AEG 2 gearbox in this rifle as electronic trigger ready, so it can take an electronic trigger unit as an upgrade.
If you would rather start with an ETU already installed, the Ronin T6 and Ronin T10 ship with the KWA ETU.
Choosing a battery
The battery and charger are not included. This rifle takes NiMH or Li-Po/Li-Fe batteries with a Tamiya connector (2020 version).
Match the connector, check that the battery fits the stock or battery space, and charge it only with a charger made for that battery type. Ask KWA if you are not sure which size fits.
Hop-up, explained
Hop-up puts backspin on the BB so it lifts and flies flatter and farther. Too little and BBs drop early. Too much and they climb.
- Start with the hop-up at its lowest setting.
- Fire a few shots at a target at your usual distance.
- Add a little hop at a time until BBs fly flat before they drop.
- Back it off if BBs start to rise. Re-check whenever you change BB weight.
KM4 SR7 vs KM4 CQB vs KM4A1
All three are full metal AEG 2 rifles with a KWA Crane stock, an A2 birdcage, adjustable hop-up and an electronic-trigger-ready gearbox.
| KM4 SR7 | KM4 CQB | KM4A1 | |
|---|---|---|---|
| Velocity | 340–360 FPS | 340–360 FPS | 385–410 FPS |
| Rate of fire | 14+ rounds per second | 13.9+ rounds per second | 13.1+ rounds per second |
| Outer barrel | 10.75 in | 10.5 in | 14.5 in |
| Inner barrel | 10.75 in | 10.75 in | 15.55 in |
| Length | 28–31.25 in | 27.75–31 in | 31.75–35 in |
| Weight | 6.79 lb | 6.70 lb | 7.21 lb |
| Handguard | 6.13-inch Picatinny rail | Two-piece clamshell handguard | Two-piece clamshell handguard |
| Battery connector | Tamiya (2020 version) | Deans / T-plug (2022 version) | Tamiya (2020 version) |
| Platform | SBR | Carbine | Carbine |
KM4 SR7 care and parts
- Disconnect the battery whenever you are not using the rifle.
- Charge with a charger made for your battery type (NiMH or Li-Po/Li-Fe).
- Keep the inner barrel and hop-up bucking clean if accuracy drops.
- Wipe the rifle down after each game and check screws and the rail before you play.
Find manuals and exploded diagrams in the KWA Resources tab on this page, or in the Manuals & Diagrams library.
KM4 SR7 FAQ
What is the KWA KM4 SR7?
A short-barreled 6mm AEG airsoft rifle from KWA with a free-float Picatinny rail, built on the KM4A1 platform with the AEG 2 gearbox.
Is the KM4 SR7 in stock?
Not right now. The block near the top of this page shows current KWA alternatives.
How many FPS does the KM4 SR7 shoot?
KWA lists it at 340–360 FPS.
How is the SR7 different from the KM4 CQB?
They are the same size. The SR7 has a free-float Picatinny rail, and the CQB has a clamshell handguard and a detachable carry handle.
Which magazines fit the KM4 SR7?
It comes with one KWA K120 120-round magazine.
Is a battery included?
No. It takes NiMH or Li-Po/Li-Fe batteries with a Tamiya connector (2020 version).
Does it come with an orange tip?
Yes. It ships with an orange muzzle brake. The black muzzle brake shown in the photos is sold separately.
Can I pay for the KM4 SR7 over time?
Yes. Choose Klarna at checkout to split it into 4 interest-free payments, or Affirm to pay over time. Both are subject to approval. See Payment Options.
Do I earn KWA Rewards points on the KM4 SR7?
Yes. KWA Rewards members earn 1 point for every $1 on orders of $50 or more, so the KM4 SR7 earns about 300 points, worth $6.00 in store credit (50 points = $1). See KWA Rewards.
Is the KM4 SR7 covered by a warranty?
Every KWA gun is backed by KWA, with warranty support and in-house service in California. Protection Plus adds extended warranty coverage and a repair plan with no repair fee, discounted parts and free return shipping. See the Protection Plus page for plan details.
