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Lead & Steel - AR Barrels, BCGs, Triggers & Other Firearm Components — 37 products / 85 models

Ramp up your rifle build with premium parts and accessories from Lead & Steel. Their selection features threaded AR barrels for AR-15 and AR-9 platforms that allow you to easily attach flash hiders and other muzzle devices. Keep the heart of your rifle pumping with a top-quality bolt carrier group or grab a new charging handle for ambidextrous operation and simple one-hand manipulation. We also carry their free float handguards in unique color choices to customize your build while adding reliable rails to attach all your favorite accessories.image

Browse all our gun parts for sale to unlock more deals on premium AR upgrades and aftermarket accessories from trusted brands like Lead & Steel. If you’re not sure which part is right for your firearm, check out our How-to Guides to learn more about how to buy the best AR-15 barrel, aftermarket trigger, gun grip, and other upgrades for your platform. Shop online at OpticsPlanet today and get Free Shipping on most orders over $49.

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Image of Gun Parts category Gun Parts
Image of Rifle Parts category Rifle Parts
Image of AR 15 Parts category AR 15 Parts
Image of AR15 Barrels category AR15 Barrels
Image of Rifle Barrels category Rifle Barrels
Image of AR15 Upper Parts category AR15 Upper Parts
Image of AR15 Lower Parts category AR15 Lower Parts
Image of AR15 Upper Receivers category AR15 Upper Receivers
Image of AR 15 Tactical Rails category AR 15 Tactical Rails
Image of AR Handguards & Forends category AR Handguards & Forends
Image of AR15 Accessories category AR15 Accessories
Image of AR15 Buffer Assemblies category AR15 Buffer Assemblies
Image of Red Dot Sights & Accessories category Red Dot Sights & Accessories
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Image of Rifle Triggers category Rifle Triggers
Image of Weapon Accessories category Weapon Accessories
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Image of Tritium & Fiber Optic Night Sights category Tritium & Fiber Optic Night Sights
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37 Products in Lead & Steel

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Image of Lead & Steel AR-15 5.56mm Threaded AR Barrel 16 models Lead & Steel AR-15 5.56mm Threaded AR Barrel (5) As Low As (Save Up to 54%) $91.79 14% Coupon
Image of Lead & Steel M-16/AR-15 Mil-Spec H3 Buffer and Chrome Silicon Buffer Spring Combo Lead & Steel M-16/AR-15 Mil-Spec H3 Buffer and Chrome Silicon Buffer Spring Combo List: $61.99 (Save $2.00) $59.99
Image of Lead & Steel AR-9 9mm Threaded AR Barrel 9 models Lead & Steel AR-9 9mm Threaded AR Barrel (1) As Low As (Save Up to 57%) $85.99 14% Coupon
Image of Lead & Steel AR-10 Anti-Lift M-LOK Handguard Lead & Steel AR-10 Anti-Lift M-LOK Handguard List: $249.99 (Save 47%) $131.99
Image of Lead & Steel V2 Enhanced Reliability Combat Trigger Lead & Steel V2 Enhanced Reliability Combat Trigger (4) List: $79.99 (Save 23%) $61.99
Image of Lead & Steel SAW Style Flash Suppressor Lead & Steel SAW Style Flash Suppressor List: $40.10 (Save 15%) $33.99 14% Coupon
Image of Lead & Steel .223/5.56mm Mil-Spec Stripped Upper Receiver 2 models Lead & Steel .223/5.56mm Mil-Spec Stripped Upper Receiver List: $108.99 (Save $9.00) $99.99
Image of Lead & Steel Back-Up Rifle Sight Lead & Steel Back-Up Rifle Sight (4) List: $49.99 (Save $2.00) $47.99
Image of Lead & Steel 4140 Nitride Quality AR-15 Gas Block 2 models Lead & Steel 4140 Nitride Quality AR-15 Gas Block As Low As (Save Up to 50%) $19.99 14% Coupon
Image of Lead & Steel All Rounder Carbine 5.56mm 16in Upper Reciever Group 4 models Lead & Steel All Rounder Carbine 5.56mm 16in Upper Reciever Group (3) As Low As (Save Up to 41%) $759.99
Image of Lead & Steel Promethean LP-1 Anodized Replacement Hood 2 models Lead & Steel Promethean LP-1 Anodized Replacement Hood (4) As Low As (Save Up to 20%) $39.99
Image of Lead & Steel L&S Polymer Vise Block Combo - Ar15/M16/M4 Lead & Steel L&S Polymer Vise Block Combo - Ar15/M16/M4 (2) $31.99
Image of Lead & Steel Mil-Spec Buffer Tube 3 models Lead & Steel Mil-Spec Buffer Tube (3) List: $51.99 (Save Up to $4.00) $49.99
Image of Lead & Steel AR-15 .300 AAC Blackout Threaded AR Barrel 7 models Lead & Steel AR-15 .300 AAC Blackout Threaded AR Barrel (1) As Low As (Save Up to 47%) $105.99 14% Coupon
Image of Lead & Steel AR-9 9mm Luger Complete Bolt Carrier Group Lead & Steel AR-9 9mm Luger Complete Bolt Carrier Group List: $200.00 (Save 35%) $129.99
Image of Lead & Steel AR-15/AR-16/M4 5.56x45mm NATO/.300 AAC Blackout/.223 Remington M16 Complete Bolt Carrier Group Lead & Steel AR-15/AR-16/M4 5.56x45mm NATO/.300 AAC Blackout/.223 Remington M16 Complete Bolt Carrier Group (3) List: $149.99 (Save 33%) $99.99
Image of Lead & Steel Receiver Tightening Wedges Lead & Steel Receiver Tightening Wedges $9.99
Image of Lead & Steel Mil-Spec Threaded Stripped Upper Receiver 2 models Lead & Steel Mil-Spec Threaded Stripped Upper Receiver $99.99
Image of Lead & Steel M-16/AR-15 Mil-Spec H2 Buffer and Chrome Silicon Buffer Spring Combo Lead & Steel M-16/AR-15 Mil-Spec H2 Buffer and Chrome Silicon Buffer Spring Combo (2) List: $57.99 (Save $2.00) $55.99
Image of Lead & Steel Ghost RMR Adapter Plate Lead & Steel Ghost RMR Adapter Plate List: $69.99 (Save 14%) $59.99
Image of Lead & Steel Open Directed Expansion Charging Handle 3 models Lead & Steel Open Directed Expansion Charging Handle (4) List: $69.99 (Save 11%) $61.99
Image of Lead & Steel Polymer Lower Receiver Vise Block Lead & Steel Polymer Lower Receiver Vise Block $19.99
Image of Lead & Steel M-16A1 Style Suppressor Flash Hider Lead & Steel M-16A1 Style Suppressor Flash Hider (2) List: $40.10 (Save 25%) $29.99
Image of Lead & Steel Drop-in Quad Rail Enhanced Handguard 2 models Lead & Steel Drop-in Quad Rail Enhanced Handguard As Low As (Save Up to 33%) $129.99
Image of Lead & Steel Just As Good 5.56mm 16in Upper Receiver Group 2 models Lead & Steel Just As Good 5.56mm 16in Upper Receiver Group (1) As Low As (Save Up to 25%) $449.99
Image of Lead & Steel 9mm Billet Upper Receiver Lead & Steel 9mm Billet Upper Receiver List: $199.99 (Save 52%) $95.99
Image of Lead & Steel MonoBloc M4/AR-15 5.56mm/.223 Remington Threaded Barrel Lead & Steel MonoBloc M4/AR-15 5.56mm/.223 Remington Threaded Barrel List: $399.99 (Save 13%) $349.99 Clearance
Image of Lead & Steel ARC M-16/AR-15/AR-10 Mil-Spec Complete Bolt Carrier Group Lead & Steel ARC M-16/AR-15/AR-10 Mil-Spec Complete Bolt Carrier Group (3) List: $41.99 (Save $2.00) $39.99
Image of Lead & Steel L&S Monobloc Barrel - Threaded 5.56MM 2 models Lead & Steel L&S Monobloc Barrel - Threaded 5.56MM (5) List: $399.99 (Save $10.00) $389.99 Best Rated
Image of Lead & Steel Short M-LOK Hand Stop Lead & Steel Short M-LOK Hand Stop List: $50.00 (Save 17%) $41.49
Image of Lead & Steel QD Sling Mount Lead & Steel QD Sling Mount List: $29.49 (Save $1.50) $27.99
Image of Lead & Steel M-LOK Finger Grip Lead & Steel M-LOK Finger Grip List: $50.00 (Save 10%) $44.99
Image of Lead & Steel ARC M-16/AR-15 Extractor Lead & Steel ARC M-16/AR-15 Extractor (1) $31.99
Image of Lead & Steel Long M-LOK Hand Stop Lead & Steel Long M-LOK Hand Stop List: $50.00 (Save 12%) $43.99
Image of Lead & Steel L&S Polymer Upper Receiver Vise Block - Ar15/M16/M4 Lead & Steel L&S Polymer Upper Receiver Vise Block - Ar15/M16/M4 List: $21.99 (Save $2.00) $19.99
Image of Lead & Steel Arc Ar15/M16 Free Float Handguard 4 models Lead & Steel Arc Ar15/M16 Free Float Handguard (2) List: $250.00 (Save 40%) $149.99
Image of Lead & Steel JAG Ar15/M16 Free Float Handguard 3 models Lead & Steel JAG Ar15/M16 Free Float Handguard (3) List: $199.99 (Save 35%) $129.99
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Lead & Steel How To Guides View All

Binary Trigger vs. FRT vs. Super Safety by Brett R.
Best Red Dot Magnifiers of 2026 on OpticsPlanet by OpticsPlanet Product Expert
Best Prismatic Red Dots of 2026 on OpticsPlanet by OpticsPlanet Product Expert
Best Pistol Night Sights for 2026 on OpticsPlanet by OpticsPlanet Product Expert
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    Last updated 2026-07-05 UTC.