What Is the PSA Olcan?

The PSA Olcan is a bullpup-style lower receiver designed to pair with PSA JAKL uppers, converting them into a compact, rear-weighted platform.

• Transforms a JAKL upper into a bullpup configuration
• Compatible with JAKL uppers 10.5” and longer (5.56)
• Designed for improved balance and compact handling
• Ideal for shooters considering a bullpup platform

Why the JAKL Works Well as a Bullpup

The JAKL platform naturally complements the Olcan due to its design features:

• Monolithic top rail allows flexible optic placement
• Forward rail space supports accessories despite compact size
• Adjustable gas system enables suppressor tuning
• Rear weight distribution enhances control in bullpup format

Optic Setup

A properly configured optic is critical on a bullpup due to height-over-bore considerations.

Recommended Setup:

• Holosun AEMS (box-style optic)
  • Circle-dot reticle
  • Multiple brightness settings
  • Night vision compatibility
  • Solar backup fail-safe

Mounting Considerations:

• Compatible with Aimpoint Micro footprint
• Scalarworks mount used to achieve increased optic height
• Taller optic height improves ergonomics on bullpup platform
  
  

Front-End Enhancements

With limited rail space, accessory choices matter.

Upgrades Included:

• B5 M-LOK Rail Covers
  • Rubberized texture for improved grip
    • Browse B5 M-Lok Rail Covers in FDE
• Magpul Barricade Stop
  • Prevents hand from moving near muzzle/suppressor
  • Adds forward control point
  • Textured surface for bracing against barricades
  • See Magpul Barricade stop in FDE

Suppressor Setup

This build uses a suppressor-optimized configuration for better shooting comfort.

Suppressor Used:

• SilencerCo Velos LBP (5.56, K configuration)

Key Benefits:

• Low back pressure design reduces gas blowback
• Short configuration maintains compact profile
• Improves overall shooting experience and sound signature

Gas System Tuning

One of the biggest advantages of the platform is adjustability.

• Adjustable gas block allows tuning for:
  • Suppressed use
  • Unsuppressed use
• Works with both low back pressure and traditional suppressors
• Helps maintain reliability and smooth cycling

Why Build an Olcan?

The Olcan offers a unique way to modernize and compact your rifle setup.

Key Advantages:

• Shorter overall length without sacrificing barrel length
• Improved balance and maneuverability
• Customizable setup for optics and accessories
• Suppressor-ready platform with tuning capability

Final Thoughts

The PSA Olcan build demonstrates how a JAKL upper can be transformed into a compact, highly adaptable bullpup system. With the right optic height, rail accessories, and suppressor setup,

the platform delivers improved ergonomics, control, and shooting performance.

Featured Gun Details: 

• Long Stroke Gas Piston Operating System
• 8620 Front Trunnion
• 4340 Carrier
• 7 Lug Shot Peened Carpenter 158 Bolt
• Monolithic 6105 Rifle-Length Receiver
• Rifle-Length Handguard
• 14.5” 5.56 Nato Nitride 4150V Chrome Moly Steel Barrel
• Twist Rate: 1 in 7” 
• Thread Pitch: 1/2x28"
• Pin & Welded SilencerCo ASR Flash Hider 1/2x28" 
• Olcan Bullpup Rifle Lower Receiver - FDE
• Die Free Co Kung Fu Grip, FDE
• Cerakote FDE
• Black Knurled Charging