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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Forward Controls Design - AR-15 Pivot & Take Down Pins Set - PF-040
Forward Controls Design, Inc
MSRP: $35.00$33.25The Forward Controls Design AR-15 Pivot & Takedown Pins Set (PF-040) is FCD's enhanced replacement pivot and takedown pin set for AR-15 lower receivers. FCD's PF-040 pins are machined to tighter...MSRP: $35.00$33.25 -
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 -
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 - 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 -
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...$45.00 -
Radian Weapons Afterburner + Ramjet Glock 19 GEN 3 - 5 Compensator/Barrel Combo - Match Grade Barrel, Intra-Lok Mount G19G3-IL-RN
Radian Weapons
$389.95AFTERBURNER + RAMJET together reduce recoil up to 44% when using 115g ammunition. At only .47" long, the AFTERBURNER offers unprecedented performance in a micro compensator and is more effective than...$389.95 -
Radian Weapons - Guardian Trijicon RMR Optic Guard Mount - Fits MOS Glocks - G1501
Radian Weapons
$209.95The Radian GUARDIAN Optic Mounting System provides unprecedented protection for your pistol red dot optic. Machined from 7075 aluminum & hard anodized, the design provides top/ front/side impact...$209.95 -
VLTOR - Set Screw Gas Block - 0.625" to 0.750" Bore GB-S
Vltor Weapon Systems
$64.95The VLTOR Set Screw Gas Block (GB-S) is a low-profile, steel gas block engineered to replace the standard front sight base on AR-15 barrels, allowing use of free-float handguards without obstruction...$64.95