FN PS90 Short-Barreled Rifles (SBRs)
FN Specialties is the industry leader in PS90 short-barreled rifles (SBRs), offering premium builds created by Armory of Kings from brand-new, factory OEM FN PS90 rifles. Each rifle begins as a new, never-owned OEM configuration and is then professionally converted in-house into an SBR with a precision-installed 10.4" barrel, your choice of muzzle device, and compliant NFA markings. Available muzzle device options include a thread adapter, P90-style compensator, and KeyMo KeyMicro (see all PS90 muzzle devices).
Our conversion process is carefully engineered to maintain proper function with the PS90’s unique floating barrel delay system. Each SBR is assembled to precise tolerances, ensuring OEM-level reliability while delivering improved maneuverability, balance, and handling.
A PS90 short-barreled rifle delivers unmatched compactness, fast target transitions, and exceptional handling — exactly how the P90 platform was originally intended. Perfect for close-quarters applications, personal defense, and range use, the PS90 SBR combines the FN platform’s proven reliability with a shorter 10.4" barrel for a more maneuverable and responsive firearm. Key benefits include:
- Compact, Original-Intent Design – reduced overall length for maneuverability, true to the original P90 configuration.
- Maintained OEM Reliability – converted from brand-new, never previously owned FN PS90 rifles while preserving proven function.
- Precision 10.4" Barrel Installation – expertly fitted with correct headspacing for optimal accuracy and performance.
- Muzzle Device Options – choose from a thread adapter, P90-style compensator, or KeyMo KeyMicro (browse PS90 muzzle devices).
Armory of Kings builds every PS90 short-barreled rifle in-house from factory-new, never previously owned FN PS90 rifles. Using industry-leading parts and precision machining, we offer multiple configurations to suit your needs, including:
- OEM-Style PS90 SBRs – retain the classic factory look with a 10.4" barrel and factory-style flash hider where required.
- Custom-Configured PS90 SBRs – built with a precision 10.4" barrel and your choice of muzzle device, including a thread adapter, P90-style compensator, or KeyMo KeyMicro, along with optional optics and accessories.
- Suppressor-Ready PS90 SBRs – configured with a 10.4" threaded barrel and adapter for seamless compatibility with popular suppressors.
After selecting your PS90 short-barreled rifle, explore our complete range of PS90 accessories, short barrels & muzzle devices, and P90/PS90-compatible receivers to fine-tune your build. If you already own a PS90 and want a conversion instead, visit our PS90 SBR conversion service. Whether you want optics, rail systems, enhanced triggers, or sling mounts, FN Specialties offers everything you need to customize your PS90 SBR for performance, compliance, and personal style.
Compliance Notice: All PS90 short-barreled rifles (SBRs) are regulated under the National Firearms Act (NFA) and require transfer through an appropriately licensed dealer. Federal registration, background checks, and the $200 NFA tax stamp are required for ownership. Always confirm state and local regulations before purchasing, as some jurisdictions prohibit or restrict SBR ownership.
Warranty Disclaimer: Once converted into an SBR, these rifles are no longer in factory OEM configuration and are not covered under the FN factory warranty. All conversions are performed by Armory of Kings from brand-new, never-owned OEM FN PS90 rifles and are backed by our own workmanship guarantee.