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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LMT Defense - MARS-(L/H) Ambidextrous AR-15 Magazine Release - LM308A6
LMT Defense
MSRP: $24.00$22.32The LMT Defense MARS-(L/H) Ambidextrous AR-15 Magazine Release (LM308A6) is a genuine LMT OEM replacement ambidextrous magazine release for MARS-L and MARS-H lower receivers. The ambidextrous...MSRP: $24.00$22.32 -
Out of stock
LMT Defense Bolt Catch & Ambidextrous Magazine Release Roll Pin #LMP251
LMT Defense
$3.15Having a spare is never the wrong answer, so keep your kit ready to roll with a spare bolt catch roll pin for your AR-15.Features: MIL-SPEC construction Made in the U.S.A. Lewis Machine and Tool is...$3.15 -
Out of stockOn Sale
Magpul PRS GEN3 Precision-Adjustable Stock Fits AR-15/AR-10 - Black #MAG672-Blk
Magpul Industries
MSRP: $259.95Now: $246.95Was: $259.95The PRS GEN3 is a field precision stock for AR15/M16 and AR10/SR25 platforms, featuring tool-less length of pull and cheek piece height adjustment. With solid adjustments for length of pull and...MSRP: $259.95Now: $246.95Was: $259.95 -
On Sale
Magpul MOE SL Carbine Stock Fits AR-15, Mil-Spec FDE MAG347-FDE
Magpul Industries
Now: $61.70Was: $64.95The Magpul MOE SL Carbine Stock — Mil-Spec, FDE (MAG347-FDE) is Magpul's slim-line (SL) 6-position adjustable carbine stock for AR-15/M4 mil-spec buffer tubes, finished in FDE (Flat Dark Earth). The...Now: $61.70Was: $64.95 -
On Sale
Magpul MS4 QDM Sling Fits AR Rifles Coyote Brown MAG953-COY
Magpul Industries
MSRP: $79.95Now: $75.95Was: $79.95The Magpul MS4 QDM Sling — Coyote Brown (MAG953-CB) is Magpul's versatile convertible two-point/one-point sling in Coyote Brown for FDE/coyote-configured AR-15/M4 rifles. All features of the standard...MSRP: $79.95Now: $75.95Was: $79.95 -
On Sale
Magpul MS4 QDM Sling Fits AR Rifles Black MAG953-BLK
Magpul Industries
MSRP: $79.95Now: $75.95Was: $79.95The Magpul MS4 QDM Sling — Black (MAG953-BLK) is Magpul's versatile convertible two-point/one-point sling for AR-15/M4 style rifles. The MS4 (Multi-Point Sling System, Generation 4) QDM (Quick...MSRP: $79.95Now: $75.95Was: $79.95 -
Out of stockOn Sale
Magpul Bipod Hard Anodized 6061 T-6 Aluminum Fits A.R.M.S And 17S Style Rails 6.3"-10.3" Length FDE #MAG951-FDE
Magpul Industries
Now: $109.20Was: $114.95The Magpul Bipod offers serious strength and versatility at a price that provides unmatched value. Rich with important features, Magpul's lightweight Mil-spec hard anodized 6061 T-6 aluminum and...Now: $109.20Was: $114.95 -
On Sale
Magpul Bipod Hard Anodized 6061 T-6 Aluminum Fits A.R.M.S And 17S Style Rails 6.3"-10.3" Length Black MAG951-BLK
Magpul Industries
Now: $109.20Was: $114.95The Magpul Bipod — Hard Anodized 6061-T6 Aluminum (MAG951-BLK) is Magpul's precision-machined aluminum bipod for rifles equipped with ARMS-style and 17S-style rails, providing a 6.3" to 10.3" height...Now: $109.20Was: $114.95 -
On Sale
Magpul Enhanced Trigger Guard Fits AR-15 Drop In Aluminum, Black MAG015-BLK
Magpul Industries
Now: $21.80Was: $22.95The Magpul Enhanced Trigger Guard — Aluminum, Drop-In (MAG015-BLK) is Magpul's billet aluminum enhanced trigger guard for AR-15/M4 pattern lower receivers. The Magpul Enhanced Trigger Guard replaces...Now: $21.80Was: $22.95 -
Out of stockOn Sale
Fostech Origin-12 SBS Complete Upper Receiver - 12GA 7009
Fostech
Now: $920.00Was: $1,197.13Fostech Origin 12 SBS Barrel Assembly. Complete upper receiver for your Fostech Origin 12 shotgun. Features a 9.75" barrel and is perfect for your SBS build. Fostech Origin 12 SBS Barrel...Now: $920.00Was: $1,197.13 -
Out of stock
Heckler & Koch Picatinny Accessory Rail G36/SL8 - #702390
Heckler & Koch
$69.00Fits the SL8 and G36 full-size forearms. This item is just over 6" in overall length and is made from aircraft-grade aluminum. Comes with the screws needed for installation. From the center of the...$69.00 -
On Sale
Magpul MOE+ Grip for AR rifles with storage compartment MAG416-BLK
Magpul Industries
MSRP: $24.95Now: $23.70Was: $24.95The Magpul MOE+ Grip for AR Rifles with Storage (MAG416-BLK) is Magpul's enhanced version of the MOE pistol grip, featuring Magpul's proprietary overmolded rubber panels on the front and back straps...MSRP: $24.95Now: $23.70Was: $24.95