SRC SR5-A3 Swat Series SMG Blowback Rifle (Co2 Powered – Black – COB-405 TM)

The SRC SR5-A3 SWAT CO2 SMG is a CO2 gas blowback replica built on the popular MP5 platform, giving it the compact handling and instantly recognisable SWAT-style profile that UK CQB skirmishers rate for tight, fast-paced games. SRC has combined metal and polymer construction to keep the SR5-A3 durable without piling on unnecessary weight, and CO2 power delivers the punchy, consistent blowback recoil this platform is known for. With safe, semi and full-auto fire on tap plus an adjustable hop-up, it’s set up to work as either a dedicated CQB primary or a fast-handling secondary alongside a full-length AEG.

Key Features

• CO2 gas blowback – authentic recoiling action on every shot, giving noticeably more feedback than a standard AEG.
• MP5-pattern platform – the compact, proven SMG silhouette favoured for close-quarters work and tight indoor arenas.
• Metal + polymer construction – SRC balances a durable metal build with polymer furniture to keep handling manageable through a long skirmish day.
• Safe / semi / full-auto fire selector – switch instantly between controlled single shots and full-auto suppression as the situation demands.
• Adjustable hop-up – tune BB backspin on the fly for a flatter, more consistent trajectory as conditions change.
• SWAT Series styling – black finish gives the SR5-A3 a purposeful, tactical look that suits CQB and SWAT-themed loadouts.

Real-World Use Cases

• CQB indoor sites – the MP5-pattern SR5-A3’s compact length and fast-cycling CO2 blowback make it a natural fit for tight indoor UK sites where manoeuvrability matters more than range.
• SWAT / room-clearance loadouts – the SWAT Series look and full-auto capability suit scenario games built around close-quarters entries and room clearance.
• Milsim secondary or backup SMG – pair it with a primary AEG as a fast-handling sidearm for vehicle crews, support gunners or players who need a lighter option for close encounters.
• Woodland skirmish support – the CO2 blowback platform also holds its own at outdoor sites as a fast-firing support gun for close engagements between cover.

Whichever role you run it in, always check your site’s specific FPS/joule limit before your first game, and load with a BB weight your site permits – most UK indoor CQB sites ask for 0.20 g–0.25 g BBs, while outdoor woodland games often allow heavier 0.28 g BBs for extra consistency at range.

Technical Specifications

• Manufacturer: SRC
• Model / SKU: SR5-A3 (212706)
• Type: Gas Blowback SMG
• Platform: MP5-pattern
• Power Source: CO2 gas blowback
• Firing Modes: Safe / Semi / Full-Auto
• Hop-Up: Adjustable
• Construction: Metal + polymer
• Colour: Black

Compatibility & Upgrades

The SR5-A3 runs on standard 12g CO2 capsules and is happy fed with a typical 0.20 g–0.28 g airsoft BB, so it slots straight into most UK players’ existing consumables without any special ordering. Because it shares the MP5 footprint, it’s a familiar platform for anyone already running MP5-pattern kit, magazines or accessories. As with any hop-up-equipped blowback platform, players looking to fine-tune performance can look at aftermarket hop-up units and inner barrels further down the line, and it’s worth keeping a couple of spare CO2 capsules in your kit bag so a re-gas takes seconds between games. Check compatible magazines and CO2 capsules before you order if you’re building this into an existing loadout.

UK Legal & Site Notes

Airsoft RIFs, including the SR5-A3, are only sold to buyers aged 18 or over, and by law you’ll need to provide valid UKARA membership or another accepted VCRA defence – such as proof of overseas residency or registered trade/business status – before we can dispatch it. Two-tone (import-legal) variants, where a manufacturer offers them, are exempt from this requirement, but this SRC SWAT Series listing is a standard black RIF. Always confirm your site’s FPS/joule limit before you play – CO2 blowback platforms can shoot warmer than AEGs, so it’s worth chronoing before your first game at a new site.

The SR5-A3 is currently showing as out of stock – check back soon for restock, or browse SRC’s other SMGs and MP5-pattern airsoft guns in stock now at Airsoftdirect. Every order that is in stock ships fast from our UK warehouse, with the same close attention to detail as the rest of our SWAT and CQB range, so you can get this SRC SR5-A3 SWAT CO2 SMG on the field with minimum delay.