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 stock
Spuhr - Trijicon RMR Interface - A-0010
Spuhr
$62.50Interface for attaching Trijicon RMR Type 1 and 2 and Trijicon SRO to an ISMS scope mount. Includes shim plate and screws. The A-0010 footprint also matches the following, though screw sizing may vary: Trijicon RMR Trijicon SRO Holosun HS407C Holosun...$62.50 -
Out of stockOn Sale
Unity Tactical - Vertical Foregrip Black - MS-VFGB
Unity Tactical
Now: $24.00Was: $26.00The Unity Tactical VFG is the perfect size Vertical Fore Grip for M-LOK rails. Its 360 degree sloping sides provide increased grip ability from all angles. It excels when used as a hand stop, but can also be employed as a straight vertical grip...Now: $24.00Was: $26.00 -
Out of stockOn Sale
Unity Tactical - FAST Red Dot Mount 2.05" Black - FST-COGB
Unity Tactical
Now: $163.00Was: $179.00FAST is a series of optic mounts and platforms that provide end users with a quicker sight picture than standard height mounts. A 2.05" optical centerline height provides faster/easier reticle acquisition while wearing electronic EarPro/communications...Now: $163.00Was: $179.00 -
Out of stockOn Sale
Unity Tactical - Fast Offset Optic Mounting Plate 2.05" - FST-SOPR
Unity Tactical
Now: $35.00Was: $39.00The FAST Offset Optic Adapter Plates place mini red dot sights on the FAST Offset Optic Base. Each plate comes with a specific optic footprint and uses the optic manufacturer's hardware. Each plate footprint will accept any mini red dot with that...Now: $35.00Was: $39.00 -
Out of stockOn Sale
Unity Tactical - FAST Offset Optic Mounting Plate 2.05" Black - FST-SOPD
Unity Tactical
Now: $35.00Was: $39.00The FAST Offset Optic Adapter Plates place mini red dot sights on the FAST Offset Optic Base. Each plate comes with a specific optic footprint and uses the optic manufacturer's hardware. Each plate footprint will accept any mini red dot with that...Now: $35.00Was: $39.00 -
Out of stockOn Sale
Unity Tactical - FAST Offset Optic Adapter 2.05" - FST-SOBB
Unity Tactical
Now: $63.00Was: $69.00The FAST Offset Optic Base attaches to either the forward or rearward mounting holes in the FAST LPVO Scope Mount. Together with a FAST Offset Optic Adapter Plate, it provides a base for attaching any number of mini red dot sights directly to the scope...Now: $63.00Was: $69.00 -
Out of stockOn Sale
Unity Tactical - FAST Offset Optic Mounting Plate 2.05" - FST-SOPA
Unity Tactical
Now: $35.00Was: $39.00The FAST Offset Optic Adapter Plates place mini red dot sights on the FAST Offset Optic Base. Each plate comes with a specific optic footprint and uses the optic manufacturer's hardware. Each plate footprint will accept any mini red dot with that...Now: $35.00Was: $39.00 -
Out of stockOn Sale
Unity Tactical - FAST QD Lever - LA385
Unity Tactical
Now: $41.00Was: $45.00Optional QD lever for FAST Micro Mounts. The FAST Magnifier Mount Series comes with this lever pre-installed. Not compatible with the FAST Optic Riser. 7075-T6 Aluminum and Type III Hardcoat Anodized Compatible with UNITY FAST MountsNow: $41.00Was: $45.00 -
Out of stock
AB Suppressor Raptor Adapter
AB Suppressor
$40.00The AB Raptor Adapter is a thread conversion piece which takes the proprietary base-end TPI of the Raptor series, and converts it to the “industry standard” 1.375 x 24 TPI.$40.00 -
Out of stock
LMT Defense - Full-Auto Piston 5.56 Bolt Carrier G2 - #R-L7Q3APE
LMT Defense
MSRP: $282.00$261.45Full auto piston bolt carrier. Developed for the Estonia Defense Forces, the new and improved design features a captive firing pin retainer similar to our .308 rifles. Drop in upgrade for all existing LMT piston rifles. SPECS Caliber: 5...MSRP: $282.00$261.45 -
Out of stock
Glock - OEM Threaded Barrel for Glock 19 Gen 5/19x/45 - 47698
Glock
$310.00High quality components and precise manufacturing make GLOCK parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure years of service you can count on. Glock OEM, threaded...$310.00 -
Out of stock
Trijicon - ACOG 4x32 Rifle Scope - TA31F-G
Trijicon
$1,617.00The Trijicon ACOG (Advanced Combat Optical Gunsight) is a fixed power, compact riflescope with an illuminated reticle pattern for use in bright to low/no light. The ACOG is designed to be extremely durable and reliable. Combining traditional, precise...$1,617.00