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.
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Out of stock
LMT Defense- Purchase the MRP-L Quad Rail 9.25" AR15 Upper Receiver #L7S1A get the Lower Receiver #M7SL for FREE
LMT Defense
$989.00Upper Receiver: The patented LMT monolithic rail platform (MRP) upper receiver, has a receiver and handguard that are made from a single piece of aerospace grade aluminum. The barrel is held in place...$989.00 -
Out of stock
LMT Defense- Purchase the MRP-L Compact Length MLOK 7.25" AR15 Upper Receiver #L7NX1A get the Lower Receiver #M7SL for FREE
LMT Defense
$989.00Upper Receiver: The LMT L7NX1A CQB Receiver is a bare monolithic MLOK upper receiver that fits intermediate-caliber cartridges with barrels between 10.5” and 18”. Additionally, this new model...$989.00 -
Out of stock
LMT Defense- Purchase the MRP-L MLOK 9.25" AR15 Upper Receiver #L7X1A get the Lower Receiver #M7SL for FREE
LMT Defense
$989.00Upper Receiver: The patented LMT monolithic rail platform (MRP) upper receiver, has a receiver and handguard that are made from a single piece of aerospace grade aluminum. The barrel is held in...$989.00 -
Out of stock
LMT Defense- Purchase the MRP-L MLOCK 13.25" AR15 Upper Receiver #L7Y1A get the Lower Receiver #M7SL for FREE
LMT Defense
$1,045.00Upper Receiver: The patented LMT monolithic rail platform (MRP) upper receiver, has a receiver and handguard that are made from a single piece of aerospace grade aluminum. The barrel is held in place...$1,045.00 -
KAC Knights Armament Company "USMC" Marked Micro Rear Sight - (Pre-Owned)
Knights Armament Company
$74.99The KAC Knight's Armament "USMC" Marked Micro Rear Sight — Pre-Owned (KAC PN: 25650-1) is a pre-owned Knight's Armament Folding Micro Rear Sight with "USMC" (United States Marine Corps) markings,...$74.99 -
Out of stock
Ruger - 10/22 Stripped Aluminum Receiver - SCU-0129
Ruger
$65.00This is a new Ruger factor stripped aluminum receiver compatible with 10/22 pattern firearms. Black Stripped Made in the USA Note: These are stripped receivers so they will not come with any...$65.00 -
Out of stock
Glock - .380 Auto OEM Complete Slides #GLOCK-380-SLIDE
Glock
$369.75Complete compact size .380 slide assembly for compact size 9mm/.40/357 frames Generations 1, 2, and 3 models 19, 23, and 32. Features a 4.02” barrel and a 6.02 sight radius. Standard fixed sights...$369.75 -
Out of stock
Knight's Armament - Aimpoint Micro 45° Offset Rail Mount - #115601
Knights Armament Company
MSRP: $163.72$156.43The KAC 45 Degree Offset Aimpoint Micro Mount is intended to be attached to either the 3 o’clock or 9 o’clock rail position, placing the red dot to the side of a primary optic at a 45-degree angle...MSRP: $163.72$156.43 -
Out of stockOn Sale
LMT Defense - 7.62/5.56 Rear Flip-Up Battle Sight - #L8JT
LMT Defense
MSRP: $162.00Now: $145.80Was: $150.30The L8JT is the rear sight for users whose primary sighting system is a red dot or variable power optic. This bomb proof rear sight from LMT Defense is intended as an excellent back up iron sight...MSRP: $162.00Now: $145.80Was: $150.30 -
Out of stockOn Sale
LMT Defense - Tactical Front Sight - L8FS
LMT Defense
Now: $87.30Was: $90.00The LMT Defense Tactical Front Sight was designed to give users of same plane upper receivers and rail systems, the ability to utilize a fixed front sight with full elevation adjustment. This front...Now: $87.30Was: $90.00 -
Out of stock
LMT Defense - 20" MWS .260 REM Barrel Assembly - #R-LM260B220S
LMT Defense
$893.00The 20-inch stainless-steel .260 Remington chambered MWS barrel features 5R right-hand rifling with a 1:9 twist. Designed for the LMT MWS receiver, this barrel utilizes a low-profile gas block,...$893.00 -
Out of stockOn Sale
LMT Defense 5.56mm 14.5" Piston MRP Barrel Assembly
LMT Defense
Now: $695.70Was: $716.85Lewis Machine & Tool piston operated 14.5-inch MRP barrel chambered for .223/5.56mm. It features a 1/2x28 threaded A2 birdcage flash hider, two-position adjustable gas block for suppressed and...Now: $695.70Was: $716.85