Gun Parts
Welcome to the Gun Parts superstore at Boss Firearms Company, LLC. Whether you are undertaking a custom precision build, performing routine armorer maintenance, or upgrading an existing platform, we stock the high-performance components you need. As an authorized dealer for premium OEM and aftermarket manufacturers, we provide everything from stripped receivers and match-grade triggers to enhanced bolt carrier groups (BCGs) and duty-ready barrels for rifles, handguns, and shotguns.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
Knights Armament - Piston Assembly - MK23 Silencer - M16X1 RH TPI - #94367
Knights Armament Company
MSRP: $774.00Now: $735.30Was: $774.00Replacement right hand piston assembly for KAC MK23 suppressorsMSRP: $774.00Now: $735.30Was: $774.00 -
Knights Armament - Piston Assembly - USP Tactical M16x1 LH - 22500
Knights Armament Company
$774.00The Knight's Armament Piston Assembly — USP Tactical M16x1 LH (KAC PN: 22500) is KAC's replacement piston assembly for Heckler & Koch USP Tactical pistols with M16x1 left-hand thread suppressor...$774.00 -
Out of stockOn Sale
Knights Armament - SR-25 PC Upper Receiver M-LOK - 16" - 111474
Knights Armament Company
Now: $4,114.69Was: $4,331.25The Knights Armament SR-25 Precision Carbine Upper Kit was built as a dual role 7.62 NATO Carbine. Every PC is equally adept at putting rounds on target at 1000 meters or raNow: $4,114.69Was: $4,331.25 -
Out of stockOn Sale
Knights Armament - SR-25 7.62 E2 M-LOK Upper Receiver - 14.5" - #111468
Knights Armament Company
Now: $4,114.69Was: $4,331.25The Knights Armament SR-25 14.5” Combat Carbine Upper kit is the latest evolution in the lightweight 7.62mm NATO Carbine platform. The 14.5” CC provides 7.62mm NATO performance in a package of...Now: $4,114.69Was: $4,331.25 -
Out of stockOn Sale
Knights Armament - Upper Receiver Kit SR-30 MOD 2 - 9.5" - 32310
Knights Armament Company
Now: $2,311.47Was: $2,433.12Knight's SR-30 E3 MOD 2 takes advantage of the .300 BLK, offering a 9.5" barrel for a significantly more transportable and maneuverable firearm. The QDC compatible Flash Hider will mount any of the...Now: $2,311.47Was: $2,433.12 -
Out of stockOn Sale
Knights Armament - Upper Receiver SR-15 MOD 2 URX 4 M-LOK 5.56 mm NATO 18" - 32309
Knights Armament Company
Now: $2,311.47Was: $2,433.12The SR-15 E3 Mod 2 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug boltNow: $2,311.47Was: $2,433.12 -
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...Now: $24.00Was: $26.00 -
Knight Armament - 5.56 QDC 3-Prong Flash Suppressor Kit - 1/2"-28 TPI - 30555
Knights Armament Company
$129.96The Knight's Armament 5.56mm QDC 3-Prong Flash Suppressor Kit (KAC PN: 30555) is KAC's signature 3-prong flash eliminator for 5.56mm rifles with 1/2"-28 TPI muzzle threading. The KAC 3-Prong Flash...$129.96 -
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 stockOn Sale
Knights Armament - SR-15 Carbine Mod2 Complete Upper - 14.5 E3 Mod 2 - #31949
Knights Armament Company
Now: $2,088.62Was: $2,198.54The SR-15 E3 MOD 2 series’ 5.56mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both enhances...Now: $2,088.62Was: $2,198.54 -
Out of stockOn Sale
LMT Defense M203 Quadrant sight, Rail Mounted
LMT Defense
Now: $387.90Was: $444.15LMT Defense Quadrant sight, mounts to a 1913 picatinny rail upper receiver.Now: $387.90Was: $444.15 -
Out of stockOn Sale
LMT Defense - M203 Leaf Sight Handguard Mounted - 8448330
LMT Defense
Now: $175.50Was: $180.90Leaf Sight for Standard M203 Grenade Launcher. Mounts directly to the standard handguard.Now: $175.50Was: $180.90