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
Knights Armament - HVM Shoe Set - 111787
Knights Armament Company
Now: $222.52Was: $234.23HVM is a two-show kit that supports various non-OEM chassis systems as well as the KVC M14 modular monocular housing as a multi-sided dovetail interface. The top/helmet shoe affixes securely via anchor hardware for head-borne use, while the...Now: $222.52Was: $234.23 -
Out of stockOn Sale
Knights Armament - K-Clip Shoe Set - 113309
Knights Armament Company
Now: $217.26Was: $228.69Knights Armanent K-Clip’s are intended for open source/universal type adaptation in which conversion from a legacy style MUM type interface plate is converted to a modern more versatile dovetail style receiver. The K-Clip adapts in seconds with no...Now: $217.26Was: $228.69 -
Out of stockOn Sale
Knights Armament - D-Collar Aluminum - 113036
Knights Armament Company
Now: $130.35Was: $137.21The Knights Armament D Collar adds significant functional utility. The aluminum D Collar provides a rigid and protective centrifugal anchor point for various aftermarket accessories while providing crush resistance to the objective lens bore. The D...Now: $130.35Was: $137.21 -
Out of stockOn Sale
Knights Armament - D-Collar Titanium - 111783
Knights Armament Company
Now: $130.35Was: $137.21The Knights Armament D Collar adds significant functional utility. The titanium (suggested for plastic housings), the D Collar provides a rigid and protective centrifugal anchor point for various aftermarket accessories while providing crush resistance...Now: $130.35Was: $137.21 -
Out of stock
Spuhr - Picatinny Rail 55mm - A-0003
Spuhr
$62.50Picatinny Rail for Spuhr interface. Includes screws. Height: 10 mm/0.39” Length: 55 mm/2.16” Weight: 18 g/0.6 oz$62.50 -
Out of stock
Spuhr - Wilcox RAPTAR Adapter - A-0029
Spuhr
$92.00Interface for attaching Wilcox RAPTAR, RAPTAR-S (Gen2,) RAPTAR Lite ES, or SilencerCo RADIUS laser range finder to ISMS scope mount. Includes screws. Height: 25 mm/.984” Length: 85 mm/3.346” (Picatinny Rail) Weight: 42 g/1.5 oz Note:...$92.00 -
Out of stock
Spuhr - G3 Stock Assembly - R-410
Spuhr
$313.50The R-410 G3 Stock Assembly brings the venerable HK G3 platform into the 22nd century, providing it with better handling and recoil management.Using the factory end cap, the 6-position adjustable stock is fully adjustable for length, with a...$313.50 -
Out of stock
Spuhr - Picatinny Rail 35mm - A-0012
Spuhr
$39.00Picatinny Rail for Spuhr interface. Includes screws. Height: 10 mm/0.39” Length: 35 mm/1.38” Weight: 14 g/0.5 oz$39.00 -
Out of stock
Spuhr - 34mm Picatinny Mount 0 MOA - 1.18" - SP-4001C
Spuhr
$475.00Durability: Prevents damage on scope due to flexing during heavy recoil or rough environment. The snipers rifle and the spotters carbine can have the same mount, enabling the use of same equipment and accessories. Rings are grooved inside to get a better...$475.00 -
Out of stock
Spuhr - Bubble Level - A-0119
Spuhr
$92.00External Bubble Level Assembly designed to attach forward on the scope mount body or ring.Perfect solution for shooters who are unable to focus on the built-in level in the standard ISMS series or who has a model without a built-in level. ...$92.00 -
Out of stockOn Sale
Knights Armament - 7-Piece 7.62 Muzzle Device Shim Set - 30130
Knights Armament Company
Now: $34.62Was: $36.45Shim set for Knight's Armament 7.62mm rifles using 3/4"x24 muzzle devices. This 7-Piece Shim Set is for use in properly timing a flash hider or muzzle brake. Shims the muzzle device off of the end of the barrel, does not fit over the barrel threads...Now: $34.62Was: $36.45 -
Out of stockOn Sale
Knights Armament - 762QDC Flash Hider 7.62 NATO - 1/2X28 - 111583
Knights Armament Company
Now: $123.44Was: $129.94Thread: 1/2"-28 compatible with Knight's Armament SR25 QDC suppressor. Includes: Knight's Armament Company QDC Flash Suppressor and shim kit with Rocksett. 7.62 QDC Flash Suppressor Specifications:Weight: 3.9 oz...Now: $123.44Was: $129.94