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 - Front Flip-Up Sight GEN2 - L8KG2
LMT Defense
MSRP: $162.00$150.30The LMT Defense Front Flip-Up Sight GEN2 (L8KG2) is LMT's mil-spec front backup iron sight (BUIS) — NSN issued (NSN: 1005-01-648-5899) and compatible with all LMT rifle sight systems. This flip-up...MSRP: $162.00$150.30 -
BT Atlas - V8 Atlas Bipod - BT10-NC
BT Atlas
$299.95The BT10-NC V8 Atlas Bipod “No Clamp” model has a two hole pattern of 1.100” with the holes being 10/32 threads. It requires any 17S size lever style mount such as the ADM-170-S, ARMS 17S, LT271 or...$299.95 -
Spuhr - 30mm Picatinny Mount 0 MOA - 1.181" - SP-3001M
Spuhr
$515.00SP-3001 - Mount for Picatinny Rail Ring Size: 30mm Tilt: 0 MIL/0 MOA Height:$515.00 -
Unity Tactical - Fast Omni Magnifier Mount - FST-OMB
Unity Tactical
$264.00The Unity Tactical FAST Omni Magnifier Mount (FST-OMB) is a premium magnifier mount designed to position EOTech/Aimpoint-compatible 3x and 5x magnifiers at the optimal 2.26" bore-to-optic height...$264.00 -
Forward Controls Design - SIG MCX Enhanced Mag Release Button - EMR-MCX
Forward Controls Design, Inc
MSRP: $30.00$28.50The Forward Controls Design SIG MCX Enhanced Magazine Release Button (EMR-MCX) is FCD's drop-in enhanced magazine release designed specifically for the SIG Sauer MCX and MPX rifle platforms. The...MSRP: $30.00$28.50 -
LMT Defense - 16" .308 Lightweight Chrome Lined Piston Barrel - R-LM308B116PS
LMT Defense
MSRP: $936.00$868.05The LMT Defense 16" .308 Lightweight Chrome Lined Piston Barrel (R-LM308B116PS) is LMT's 7.62x51mm NATO piston-operated MRP-H barrel assembly, combining a lightweight chrome-lined bore with LMT's...MSRP: $936.00$868.05 -
VLTOR - Extended Length AK47 Handguard W/ M-LOK System - #CMRD-AKM-E
Vltor Weapon Systems
$226.80The VLTOR CMRD AK Handguard is the first in many variations that VLTOR has planned for AK handguards. At this time it is offered in the “extended length” version but there will be lengths soon to...$226.80 -
On Sale
Pelican - 1720 Protector Long Case - OD GREEN - 017200-0000-130
Pelican
MSRP: $414.95Now: $349.95Was: $414.95Sensitive equipment needs protection, and since 1976 the answer has been the Pelican™ Protector Case. These cases are designed rugged, and travel the harshest environments on earth. Against the...MSRP: $414.95Now: $349.95Was: $414.95 -
On Sale
Unity Tactical - FAST Red Dot Riser Elevates Lower 1/3 Mount to 2.26" Optical Height - FST-ORF
Unity Tactical
Now: $95.00Was: $105.00The Unity Tactical FAST Red Dot Riser (FST-ORF) in FDE/Tan elevates lower 1/3 co-witness red dot optics to 2.26" optical height, providing the optimal cheek weld and natural head position for AR-15...Now: $95.00Was: $105.00 -
On Sale
Unity Tactical Fast Micro 2.26" Optical Height Red Dot Mount FST-MICB - T1/T2 Compatible, Black Anodized Finish
Unity Tactical
Now: $186.00Was: $205.00The Unity Tactical FAST Micro 2.26" Optical Height Red Dot Mount (FST-MICB) elevates T1/T2-footprint micro red dot sights to a 2.26" bore-to-optic height, enabling a natural head position on AR-15...Now: $186.00Was: $205.00 -
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 -
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