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
Glock .45ACP OEM Complete Slides
Glock
$372.75Glock45ACP OEM Complete Slides *Photos are of some of the slides we are selling but are otherwise generic.$372.75 -
Out of stock
Glock - 9mm OEM Complete Slides MOS and Standard
Glock
$342.50New Glock 9mm OEM Complete Slides. *Photos are of some of the slides we are selling but are otherwise generic.$342.50 -
Out of stock
Proof Research - Carbon Fiber LMT MWS Converted 6.5CM Barrel - PRCFMWS-CONV
Proof Research
$1,250.00Proof Research carbon fiber 6.5 CM barrel converted by D.Wilson Mfg to fit LMT's MWS platform. These barrels are 8 twist, 4 groove, 5/8-24 threaded and accept an .875 gas block. Proof Research PR10 6...$1,250.00 -
LMT Defense - Complete MARS-L SOPMOD Lower Receiver - M7DA4
LMT Defense
$969.30The LMT Defense Complete MARS-L SOPMOD Lower Receiver (M7DA4) is the full-featured SOPMOD-configuration MARS-L complete lower receiver. The LMT® Modular Ambidextrous Rifle System (MARS®) lower...$969.30 -
LMT Defense - M203 Quick Detach Mounting Bracket - C-12973116
LMT Defense
MSRP: $348.00$322.65The LMT Defense M203 Quick Detach Mounting Bracket (C-12973116) is a quick-detach mounting bracket for LMT M203 grenade launcher systems. This QD bracket enables faster installation and removal of...MSRP: $348.00$322.65 -
LMT Defense - M203 BARREL 9” - LMP380
LMT Defense
MSRP: $598.00$554.40The LMT Defense M203 Barrel 9" (LMP380) is a 40mm grenade launcher barrel assembly — NSN: 1010-01-611-3461. This 9-inch M203 barrel is compatible with LMT's Classic M203 Receiver (LMP300E) and Rail...MSRP: $598.00$554.40 -
Out of stockOn Sale
LMT Defense - M203 Barrel 7” - #LMP350
LMT Defense
MSRP: $598.00Now: $538.20Was: $554.40LMT Defense M203 GRENADE LAUNCHER BARREL ASSEMBLY, 7″ This barrel is exclusively compatible with our L2X1 model “Shorty 40” grenade launcher.MSRP: $598.00Now: $538.20Was: $554.40 -
On Sale
LMT Defense - Ambidextrous Charging Handle Assembly - .308 - #R-LM308CB
LMT Defense
Now: $145.80Was: $150.30LMT Defense Ambidextrous .308 Charging Handle with Enhanced Tactical Latch. Utilizes dead stop latches to reduce tension on latch pins. A great cost effective upgrade for any SR-25 pattern modern...Now: $145.80Was: $150.30 -
Out of stock
LMT Defense - Detachable Carry Handle Rear Sight - #L8B
LMT Defense
$209.00LMT Defense Detachable Carry* Handle Rear Sight Long before multi-MOA parallax free red dot sights and .1 milrad subtension reticles to help compensate for things like altitude density, expert...$209.00 -
Out of stockOn Sale
LMT Defense - Extension Tube - .308 - #LMP259C
LMT Defense
MSRP: $64.30Now: $57.87Was: $59.67LMT Defense .308 receiver extension tube. LMT offers its 308 receiver extension, or buffer tube, for sale to customers for their builds. This tube is approx. 3/4″ longer than a standard AR-15 style...MSRP: $64.30Now: $57.87Was: $59.67 -
Out of stock
LMT Defense - 5.56 Enhanced Full-Auto Bolt Carrier - R-L7Q3A
LMT Defense
MSRP: $239.00$221.85The LMT Defense 5.56 Enhanced Full-Auto Bolt Carrier (R-L7Q3A) is LMT's enhanced direct impingement 5.56 bolt carrier group, full-auto rated for maximum longevity. The enhanced carrier design...MSRP: $239.00$221.85 -
Out of stockOn Sale
LMT Defense - Buffer Tube Kit - 5.56 - #LM556BTK
LMT Defense
MSRP: $97.00Now: $87.30Was: $90.00LMT Defense kept the AR builders in mind with this essential kit for your next project. The LM556BTK is ready to install in your stripped lower. Kit ships with a dry film lubed, Mil-Spec 6 position...MSRP: $97.00Now: $87.30Was: $90.00