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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Volquartsen Competition Bolt 2.0 for 10/22 VF10BLT
Volquartsen
$270.00Upgrade your Ruger 10/22 with the Volquartsen Complete CNC-Machined Bolt, precision-engineered for match-grade accuracy and reliability. This premium 10/22 bolt features a hardened, tuned extractor...$270.00 -
KAC Knights Armament Company SR-25 A3 6.5 CM 22" Upper Receiver 100223
Knights Armament Company
$3,283.20The KAC SR-25 A3 complete upper receiver is chambered in 6.5 Creedmoor and built for precision long-range shooting on the SR-25/AR-10 platform. It arrives complete and drop-in ready for compatible...$3,283.20 -
Out of stock
KAC Knights Armament Company SR-15 KS2 14.5" 5.56 NATO Upper 121436
Knights Armament Company
$1,800.00This is a new Knights Armament Company SR-15 KS2 14.5” complete upper receiver kit chambered in 5.56 NATO. This upper receiver features a 14.5” cold hammer forged, chrome lined, 1:7” rate of twist,...$1,800.00 -
Out of stock
KAC Knights Armament Company SR-25 KS7 14.5" 6.5 Creedmoor Upper 116741
Knights Armament Company
$3,312.00This is a new Knights Armament Company SR-25 KS7 14.5” complete upper receiver kit chambered in 6.5 Creedmoor. This upper receiver features a 14.5” cold hammer forged, dimpled hybrid barrel, medium...$3,312.00 -
Proof Research AR-Style Barrel 308 Win. 16" 1:10" Twist 5/8-24 Carbon Fiber Wrapped 101261
Proof Research
MSRP: $1,149.00$999.00Upgrade your AR-10 platform with the pinnacle of barrel technology: the Proof Research AR-Style .308 Winchester 16" Carbon Fiber Barrel (Part 101261). Designed for tactical shooters, hunters, and...MSRP: $1,149.00$999.00 -
J P Enterprises AR15 6.5 Grendel/ 6mm ARC Complete Bolt Assembly JPBC-EB6.5G
JP Enterprises
$155.75The JP Enterprises AR-15 6.5 Grendel / 6mm ARC Complete Bolt Assembly Enhanced (JPBC-EB6.5G) is a precision-machined, enhanced bolt assembly built from SAE 9310 nickel-chromium-molybdenum steel — the...$155.75 -
Proof Research CZ 455/457 .22LR 18.5" Threaded Barrel 121443
Proof Research
$825.00The Proof Research .22 LR 18.5” Threaded Barrel (121443) brings Proof Research’s legendary aerospace-grade carbon fiber barrel construction to the .22 LR rimfire platform. This prefit carbon fiber...$825.00 -
FCD Forward Controls Design 3 Prong Flash Suppressor 5/8x24 3P10
Forward Controls Design, Inc
$85.50The FCD Forward Controls Design 3-Prong Flash Suppressor 5/8x24 (3P10) is a compact, purpose-built 3-prong flash hider designed for .308/7.62x51mm and larger caliber rifles with 5/8x24 TPI muzzle...$85.50 -
Out of stock
Glock Magazine 9mm 15rd G43X G48 #79269
Glock
$32.73The Glock Factory Magazine 9mm 15-Round for Glock 43X & Glock 48 (Part #79269) is the OEM factory original, drop-free steel magazine designed specifically for Glock 43X and Glock 48 pistols. This is...$32.73 -
Out of stock
Proof Research AR-Type Barrel 308 Win. 18" Rifle Length 100028
Proof Research
$1,149.00The Proof Research .308 Winchester 18” Rifle-Length Carbon Fiber AR-Type Barrel (100028) delivers match-grade precision from .308 Win and 7.62 NATO AR-10, DPMS-pattern, and SR-25 semi-automatic...$1,149.00 -
KAC Knight's Armament SR-15 URX-6 Notched Handguard, 10.5" 122025
Knights Armament Company
$287.28The KAC Knight's Armament SR-15 URX-6 Notched Handguard 10.5" (KAC PN: 122025) is KAC's latest generation URX-6 free-float handguard designed for the SR-15 platform in a 10.5" length for CQB and SBR...$287.28 -
Die Free Company Kung Fu Rifle Grip AR-15/AR-10 KFG-BLK
Die Free Co
$18.00Designed for AR15/M4 and AR10/SR25 platforms, the Kung Fu Grip has a reduced angle providing a natural fighting posture when firing from modern standing and prone positions. It improves comfort...$18.00