Gun Parts
Welcome to the Gun Parts superstore at Boss Firearms Company, LLC. Whether you are undertaking a custom precision build, performing routine armorer maintenance, or upgrading an existing platform, we stock the high-performance components you need. As an authorized dealer for premium OEM and aftermarket manufacturers, we provide everything from stripped receivers and match-grade triggers to enhanced bolt carrier groups (BCGs) and duty-ready barrels for rifles, handguns, and shotguns.
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Out of stockOn Sale
B5 Systems Type-23 P Polymer Grip - Black - Milspec AR #PGR-1122
B5 Systems
Now: $19.00Was: $20.00This is a new B5 Systems Type 23 P grip compatible with AR pattern firearms. The B5 Systems Type 23 P-Grip offers an increased vertical grip angle and extended tang to improve ergonomics and ensure...Now: $19.00Was: $20.00 -
On Sale
B5 Systems Type 22/Type23 P Grip Plug - Coyote Brown GRP-1459
B5 Systems
Now: $9.98Was: $10.50The B5 Systems Type 22/Type 23 P Grip Plug in Coyote Brown (GRP-1459) is a precision-molded polymer plug designed to fill the storage cavity in B5 Systems' Type 22 and Type 23 P-Grip pistol grips...Now: $9.98Was: $10.50 -
On Sale
B5 Systems M4 Multi-Tasker Tool for AR Pattern Firearms MTR-1395
B5 Systems
Now: $23.70Was: $24.95The B5 Systems M4 Multi-Tasker Tool (MTR-1395) is a compact, purpose-built multi-tool designed specifically for field maintenance and function of the AR-15 / M4 platform. This tool handles the most...Now: $23.70Was: $24.95 -
On Sale
B5 Systems 6061 Aluminum AR Milspec Trigger Guard - Black ATG-1092
B5 Systems
Now: $19.00Was: $20.00The B5 Systems 6061 Aluminum AR Milspec Trigger Guard in Black (ATG-1092) is a precision-machined, drop-in replacement trigger guard for AR-15 rifles that eliminates the standard polymer trigger...Now: $19.00Was: $20.00 -
On Sale
B5 Systems Rail Covers 4 Pack Fits M-LOK - Coyote Brown RCM-1258
B5 Systems
Now: $17.10Was: $18.00The B5 Systems M-LOK Rail Covers 4-Pack in Coyote Brown (RCM-1258) provide the same comfortable, snap-in M-LOK rail protection as the RCM-1257 in a Coyote Brown color option that coordinates with...Now: $17.10Was: $18.00 -
On Sale
B5 Systems Rail Covers 4 Pack Fits M-LOK - FDE RCM-1257
B5 Systems
Now: $17.10Was: $18.00The B5 Systems M-LOK Rail Covers 4-Pack in FDE (RCM-1257) are low-profile hand protectors designed to snap securely into M-LOK slots on AR-15 handguards. These covers protect your hands from sharp...Now: $17.10Was: $18.00 -
Out of stockOn Sale
B5 Systems Rails Covers 4 Pack Fits M-LOK Black #RCM-1256
B5 Systems
Now: $17.10Was: $18.00This is a new B5 Systems 4-pack of rubber rail covers compatible with M-LOK handguards. The M-LOK Rail Cover is designed to fit most machined rails and polymer handguards. The soft no-slip material...Now: $17.10Was: $18.00 -
On Sale
B5 Systems Collapsible Precision Stock Assembly AR's Coyote Brown CPS-1306
B5 Systems
MSRP: $230.00Now: $218.50Was: $230.00The B5 Systems Collapsible Precision Stock (CPS) Assembly in Coyote Brown (CPS-1306) is B5 Systems' premium adjustable rifle stock designed for precision AR-15 shooters who demand a higher cheekweld,...MSRP: $230.00Now: $218.50Was: $230.00 -
On Sale
B5 Systems Bravo Stock Assembly Milspec - Coyote Brown BRV-1086
B5 Systems
Now: $57.95Was: $61.00The B5 Systems Bravo Stock Assembly for AR Milspec buffer tubes in Coyote Brown (BRV-1086) delivers the same enhanced ergonomics and rugged reliability of the Bravo stock in a tactical Coyote Brown...Now: $57.95Was: $61.00 -
On Sale
B5 Systems Bravo Stock Assembly Milspec - Black BRV-1082
B5 Systems
MSRP: $61.00Now: $57.95Was: $61.00The B5 Systems Bravo Stock Assembly for AR Milspec buffer tubes in Black (BRV-1082) is a premium, purpose-built AR-15 stock designed for shooters who want enhanced ergonomics and functionality over a...MSRP: $61.00Now: $57.95Was: $61.00 -
On Sale
B5 System SOPMOD Stock Assembly AR Milspec - Multicam SOP-1078
B5 Systems
Now: $121.60Was: $128.00The B5 Systems SOPMOD Stock Assembly for AR Milspec buffer tubes in Multicam (SOP-1078) is the commercial production version of the iconic SOPMOD stock design used by U.S. Special Operations Forces...Now: $121.60Was: $128.00 -
Out of stockOn Sale
B5 Systems SOPMOD Stock Assembly AR Milspec - Coyote #SOP-1076
B5 Systems
Now: $95.00Was: $100.00This is a new B5 Systems SOPMOD stock assembly compatible with AR pattern buffer tubes. The SOPMOD features color-matched steel hardware, no slip-cushioned buttpad, and dual water-resistant storage...Now: $95.00Was: $100.00