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 - RAPTAR S Adapter - A-0029C
Spuhr
$92.00Interface for attaching a Gen1 Wilcox RAPTAR-S to ISMS scope mount or spotting scope ring. Features an interrupted rail to compensate for the mold seam on the Gen1 RAPTAR-S (if mounted on a standard uninterrupted Picatinny rail the Gen1 RAPTAR-S will...$92.00 -
Out of stock
Spuhr - 36mm Picatinny 0 MOA - 1.5" - SP-6002
Spuhr
$475.00The SP-6002 went through a re-design during 2020. The updated design has been shortened 11 mm and the mount body was fitted with an integrated bubble level. Gen1 & Gen2 versions use the A-0072 side clamp, whereas the current design use the A-0065...$475.00 -
Out of stock
Spuhr - G3 Top Rail - R-402
Spuhr
$231.00Lightweight Top Rail for G3 and clones. Uses a unique cummerbund design to ensure that the front of the rail remains secure and movement free. Made from single billet of 7075 T651.Height: 13 mm/0.51” (from top of receiver to top of rail)Length: 245...$231.00 -
Knights Armament - SR-25 Magazine 20-Round - 98036-1
Knights Armament Company
$119.23The Knight's Armament SR-25 20-Round Magazine (KAC PN: 98036-1) is KAC's genuine factory 20-round magazine for the SR-25 semi-automatic precision rifle system in 7.62x51mm NATO (.308 Winchester). The KAC SR-25 magazine is built to the same exacting...$119.23 -
Out of stockOn Sale
Knights Armament - 30mm Viper Picatinny Scope Cap - 113908
Knights Armament Company
Now: $189.28Was: $199.24Knights Armament picatinny rail scope cap allows for attaching accessory sighting systems.Now: $189.28Was: $199.24 -
Out of stockOn Sale
Knights Armament - 34mm Scope Mount - 25284
Knights Armament Company
Now: $345.63Was: $363.83Knights Armament 34mm 1-Piece Scope Mount This KAC 34mm 1-Piece Scope Mount is constructed of lightweight aluminum and is compatible with any Picatinny-type top rail. Attaches via a pair of 1/2″ bolts. Available in Black. Ring Size: 34mm Right...Now: $345.63Was: $363.83 -
Out of stockOn Sale
Knights Armament - 34mm Extended Eye Relief 1-Piece Scope Mount - 30025
Knights Armament Company
Now: $388.55Was: $409.00This KAC 34mm Extended Eye Relief 1-Piece Scope Mount is constructed of lightweight aluminum and is compatible with any Picatinny-type top rail. It is canted forward to allow for greater eye relief when using a large variable power optic on a rifle with...Now: $388.55Was: $409.00 -
Out of stockOn Sale
Knights Armament - 30mm Scope Mount - 24755
Knights Armament Company
Now: $388.55Was: $409.00This KAC 30mm 1-Piece Scope Mount is constructed of lightweight aluminum and is compatible with any Picatinny-type top rail. It is the scope mount that was developed for use in the M110 SASS rifle package. Attaches via a pair of 1/2″ bolts...Now: $388.55Was: $409.00 -
Out of stockOn Sale
Knights Armament - Leupold Delta Point Pro Modular Scope Cap Attachment - 113911
Knights Armament Company
Now: $207.87Was: $218.81Allows attachment of optics with Leupold Delta Point Pro footprint to the Modular Scope Cap.Now: $207.87Was: $218.81 -
Out of stockOn Sale
Knights Armament - Trijicon RMR Modular Scope Cap Attachment - 113909
Knights Armament Company
Now: $129.95Was: $136.79Allows attachment of optics with Trijicon RMR footprint to the Modular Scope Cap.Now: $129.95Was: $136.79 -
Out of stockOn Sale
Knights Armament - Rear Sight Peep Aperture Insert 300 meter - 97081
Knights Armament Company
Now: $2.81Was: $2.96This KAC Aperture Sight Insert snaps into a 300 Meter Flip Up Rear Sight, constricting the peep aperture for a more precise sight picture.Now: $2.81Was: $2.96 -
Knights Armament - Universal Bridge - 111793
Knights Armament Company
$968.81The Knight's Armament Universal Bridge (KAC PN: 111793) is KAC's low-profile Picatinny rail accessory bridge for mounting a secondary device over a KAC RAS or URX handguard. The Universal Bridge spans between two rail sections on the top rail of the...$968.81