Everything you need for your XF50 Tri-Rail or XF50 Slick Side SBR project. (XF50 formerly Effen 90)
- XF50 Slick Side or XF50 Tri-Rail Upper Receiver*
- CMMG 10.4″ Barrel
- CMMG PS90 Style Compensator, CMMG 1/2″x28 Thread Adapter or GSL Bi-Lock Flash Hider
- Extended Cocking Handle Assembly
- Enhanced PS90 Take Down Button
- Stainless Steel PS90 Upper Receiver Spring Set by Dorin Technologies
*Serialized Component. FFL required.
COMPLIANCE NOTICE: TAX STAMP REQUIRED. THIS KIT MAY NOT BE ASSEMBLED TO A RIFLE WITHOUT A TAX STAMP FROM THE ATF. PLEASE VISIT ATF.GOV FOR FURTHER INFORMATION.
The XF50 (formerly Effen 90) PS90 Custom Billet Receiver is one of those upgrades that will make your PS90 look amazing. The XF50 has its own unique serial number and replaces the Factory FN upper receiver. Perfect for your next SBR project.
The XF50 uses the same action and lower assembly as the regular PS90. The XF50 Slick Side or Tri-Rail Upper Receiver is a stripped component that requires additional parts for assembly and operation. The good news? This kit includes everything you need for a complete upper assembly.
- Precision CNC'd out of billet 6061 aluminum
- Weighs 14.8 oz (35% lighter than the Factory FN receiver)
- Tactical low profile, integral, 12 lug, mil-spec picatinny rail
- Monolithic single piece construction
- Billet 6061 aluminum construction provides higher strength than the factory cast receiver
- Durable black anodized finish
- Marked 5.7x28
- Great for NFA SBR builds or upgrading your factory receiver
- Will accept standard FN PS90 parts
- Simply THE BEST aftermarket PS90/P90 receiver ever made