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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LMT Defense - Barrel Mount Complete Frame - L2H1PG
LMT Defense
MSRP: $1,329.00$1,232.10The LMT Defense Barrel Mount Complete Frame (L2H1PG) is the complete mounting frame for the LMT rail-mounted M203 grenade launcher system. This frame provides the structural mounting interface...MSRP: $1,329.00$1,232.10 -
LMT Defense - 5.56 Enhanced Bolt - L7Q3B
$404.55If our standard bolt is the infantryman of the gun industry, then our enhanced bolt is the delta operator. This bolt was designed to function effectively in full-auto, suppressed, and short barrel...$404.55 -
LMT Defense - M4 GEN2 Collapsing Buttstock - L291B
LMT Defense
MSRP: $86.10$79.83The LMT Defense M4 Gen2 Collapsing Buttstock (L291B) is LMT's updated Generation 2 mil-spec M4-style collapsible buttstock. Designed for AR-15/M4 carbine platforms, the M4 Gen2 features improved fit...MSRP: $86.10$79.83 -
LMT Defense - Semi-Auto Ambidextrous Selector - LMP092CAA
LMT Defense
$59.67The LMT Defense Semi-Auto Ambidextrous Selector (LMP092CAA) provides true ambidextrous safety/selector operation for AR-15 builds. This drop-in ambidextrous safety selector features levers on both...$59.67 -
On Sale
Magpul - PMAG D-50 9mm 50rd - MAG1137-BLK
Magpul Industries
Now: $118.70Was: $124.95The Magpul PMAG D-50 GL9 9mm 50-Round Drum Magazine for Glock-Compatible Firearms (MAG1137-BLK) is Magpul's 50-round polymer drum magazine designed for Glock-compatible 9mm pistols, carbines, and PCC...Now: $118.70Was: $124.95 -
LMT Defense - Carbine Length AR15 Polymer Handguard Set - LMP154G
LMT Defense
$66.30The LMT Defense Carbine Length AR15 Polymer Handguard Set (LMP154G) is a mil-spec drop-in polymer handguard set for standard AR-15 carbine builds. Designed as a lightweight, durable, and...$66.30 -
Forward Controls Design - 6310RF 5/8 x 24 Flash Suppressor / Compensator - 6310RF
Forward Controls Design, Inc
MSRP: $90.00$85.50The Forward Controls Design 6310RF Flash Suppressor / Plan B Mount — 5/8x24 (6310RF) is FCD's premium 3-prong flash hider and Plan B/Atlas compatible suppressor mount for .308/7.62x51mm rifles with...MSRP: $90.00$85.50 -
Forward Controls Design - Select Fire Short Throw to Semi Safety Selector - ASF-SF-50Q
Forward Controls Design, Inc
MSRP: $100.00$95.00The Forward Controls Design Select-Fire Short Throw to Semi Safety Selector (ASF-SF) is FCD's specialized selector for law enforcement and military personnel operating select-fire AR-15/M16 platforms...MSRP: $100.00$95.00 -
Forward Controls Design - 308 Ambidextrous Charging Handle Black - ACF-308
Forward Controls Design, Inc
MSRP: $125.00$118.75The Forward Controls Design .308/7.62 Ambidextrous Charging Handle — Black (ACF-308) is FCD's duty-grade ambidextrous charging handle designed for .308/7.62x51mm large-frame AR-10/SR-25 pattern...MSRP: $125.00$118.75 -
Forward Controls Design - Panel Cable Management - PCM
Forward Controls Design, Inc
MSRP: $30.00 - $55.00$28.50 - $52.25The Forward Controls Design Panel Cable Management (PCM) is FCD's lightweight M-LOK cable management panel for routing weapon light, pressure switch, and IR laser cables cleanly along the handguard...MSRP: $30.00 - $55.00$28.50 - $52.25 -
Forward Controls Design - Semi-Auto 50° Non-Offset Levers - ASF-50
Forward Controls Design, Inc
$90.25The Forward Controls Design Semi-Auto 50° Non-Offset Ambidextrous Safety Selector (ASF-50) is FCD's 50-degree short-throw semi-auto safety selector with standard (non-offset/centered) levers for...$90.25 -
Forward Controls Design - 90° Non-Offset Levers - ASF-90
Forward Controls Design, Inc
$90.25The Forward Controls Design 90° Non-Offset Ambidextrous Safety Selector (ASF-90) is FCD's 90-degree full-throw semi-auto safety selector with non-offset (standard) levers for AR-15/M16 pattern rifles...$90.25