Parts & Accessories
Shop AR-15 and AR-10 parts and accessories from Boss Firearms. Our parts inventory includes LMT upper and lower receivers, Proof Research carbon fiber barrels, Forward Controls Design components, Geissele triggers, Magpul furniture, BCM parts, SureFire lights, and much more. Whether you're building a new rifle or upgrading your current setup, we carry the hard-to-find components trusted by military, law enforcement, and serious civilian shooters.
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Out of stockOn Sale
B5 Systems Type-22 P Polymer Grip - Black Milspec AR #PGR-1452
B5 Systems
Now: $19.00Was: $20.00This is a new B5 Systems Type 22 P grip compatible with AR pattern firearms. The B5 Systems Type 22 P-Grip offers an increased vertical grip angle to improve ergonomics and ensure proper trigger index. The lack of a backstrap places the hand higher on...Now: $19.00Was: $20.00 -
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 proper trigger index. Proudly made in the USA.Now: $19.00Was: $20.00 -
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 common field maintenance tasks including adjusting the...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 guard for improved hand protection and a more solid feel...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 Magpul FDE, B5 Coyote, and tan-finished AR accessories...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 rail edges during handling and provide a smooth,...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 and ribbing provide a sure grip, providing extra...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, more consistent optic alignment, and greater stability...MSRP: $230.00Now: $218.50Was: $230.00 -
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 standard M4 stock. The Bravo features an extended...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. B5 Systems produces the genuine SOPMOD stock for both...Now: $121.60Was: $128.00 -
Out of stockOn Sale
B5 Systems SOPMOD Stock Assembly AR Milspec - Black #SOP-1074
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 compartments. The SOPMOD is made of Mil-Spec materials...Now: $95.00Was: $100.00 -
Haley Strategic Partners - Thorntail X Inline Light Mount -LM_TX_MLOK_INL-1-1-BLK
$45.00The Haley Strategic Partners Thorntail X Inline Light Mount for M-LOK (LM_TX_MLOK_INL-1-1-BLK) is a precision-machined weapon light mounting solution designed to mount a SureFire Scout-style weapon light inline (parallel and underneath) with the rifle...$45.00