Specna Arms PPK-20 SA-J20 VAPOR™ GBB Submachine Gun
The Specna Arms SA-J20 VAPOR™ GBB is a compact and highly realistic gas blowback submachine gun developed in cooperation with Well Pro. Inspired by the modern PPK-20 platform, this replica is designed for players who demand realism, recoil, and durability in CQB and tactical gameplay environments.
Its compact dimensions, robust construction, and powerful blow-back system make the SA-J20 VAPOR an excellent choice both as a primary weapon for close-quarters combat and as a backup replica for snipers or support players.
Premium Construction
The replica combines aluminium, steel, and reinforced polymer components for exceptional durability and realistic handling.
Aluminium components include:
- Outer barrel
- Dummy gas tube
- Bolt carrier
- Ambidextrous fire selectors
- Charging handle
- Magazine housing
Steel reinforced parts include:
- Muzzle device
- Barrel
- Receiver cover
- Fire selector levers
- Magazine release
- Barrel lock and hinge
- QD sling mount
- Pins and screws
- Reinforced hop-up chamber housing
- Two-piece recoil spring guide
- Return spring
Polymer components include:
- M-LOK handguard with RIS rails
- 9-position adjustable stock with rubber buttpad
- Ergonomic pistol grip
Realistic Blowback & NPAS System
The SA-J20 VAPOR features a strong and smooth gas blowback system that delivers satisfying recoil and realistic weapon handling during both semi-auto and full-auto fire.
The replica is factory-equipped with an NPAS (Negative Pressure Adjustable System), allowing users to fine-tune muzzle velocity and optimize recoil characteristics depending on field requirements and weather conditions.
Perfect for CQB & Tactical Gameplay
The compact dimensions and lightweight handling make this PPK-20 style GBB SMG ideal for tight indoor environments, CQB arenas, and dynamic tactical gameplay.
The integrated M-LOK and RIS mounting system allows easy installation of accessories such as:
- Red dot sights
- Weapon lights
- Lasers
- Vertical grips
- Tracer units
Browse compatible accessories in our tactical gear collection and optics collection.
Authentic Details
Fans of realism will appreciate the authentic 6P73 and 9x19 markings, realistic operating controls, and ambidextrous selector system designed to accommodate both right and left-handed users.
The 14mm CCW thread also allows installation of suppressors or tracer devices for enhanced customization.
Discover more replicas in the Specna Arms collection or browse all airsoft guns.
Package Includes
- Specna Arms SA-J20 VAPOR™ GBB SMG
- 38-round low-cap gas magazine
- Cleaning rod
- Allen key
- BB speedloader
Specifications
| Brand |
Specna Arms |
| Model |
SA-J20 VAPOR™ |
| Platform |
PPK-20 / AK-style GBB SMG |
| Power Source |
Green Gas |
| Blowback |
Yes |
| Fire Modes |
Semi-auto / Full-auto |
| Muzzle Velocity |
320 FPS |
| Hop-Up |
Adjustable |
| Inner Barrel Length |
160 mm |
| Magazine Capacity |
38 BBs |
| Magazine Type |
Low-cap |
| Thread |
14mm CCW |
| Material |
Aluminium, steel, polymer |
| Length |
69 cm |
| Minimum Length |
61 cm |
| Weight |
3045 g |
| Colour |
Black |
