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Best Seller
Strike Industries Ar Receiver Enhanced Castle Nut W/Extended Qd Endplate - Ar Receiver Enhanced Cast

Strike Industries Ar Receiver Enhanced Castle Nut W/Extended Qd Endplate - Ar Receiver Enhanced Cast

$20 off orders $250+. Use code VSJ.

Yet another first, the Enhanced Castle Nut and Extended End plate combo represent Strike Industries' dedication to thinking outside the box. The SI Enhanced ECN and EEP stand out from the generic parts kit units in both aesthetics and function. The... ... more

Strike Industries Ar Receiver Enhanced Castle Nut W/Extended Qd Endplate - Ar Receiver Enhanced Cast

Yet another first, the Enhanced Castle Nut and Extended End plate combo represent Strike Industries' dedication to thinking outside the box. The SI Enhanced ECN and EEP stand out from the generic parts kit units in both aesthetics and function. The...

$59.99

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Luth-Ar Ar-15 Mba-3/Mba-4 Carbine Castle Nut - Ar-15 Mba-3/Mba-4 Carbine Castle Nut Black Steel

Luth-Ar Ar-15 Mba-3/Mba-4 Carbine Castle Nut - Ar-15 Mba-3/Mba-4 Carbine Castle Nut Black Steel

$20 off orders $250+. Use code VSJ.

FITS: The Luth-AR Carbine Lock Ring/Castle Nut for MBA-3 and MBA-4 Carbine Buffer Kits, as well as any Mil-Spec or Commercial Carbine receiver extension. Mfg: Luth-Ar Llc ... more

Luth-Ar Ar-15 Mba-3/Mba-4 Carbine Castle Nut - Ar-15 Mba-3/Mba-4 Carbine Castle Nut Black Steel

FITS: The Luth-AR Carbine Lock Ring/Castle Nut for MBA-3 and MBA-4 Carbine Buffer Kits, as well as any Mil-Spec or Commercial Carbine receiver extension. Mfg: Luth-Ar Llc

$4.69

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Best Seller
Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Square Replacement Pins 3 Pack

Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Square Replacement Pins 3 Pack

$20 off orders $250+. Use code VSJ.

Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new... ... more

Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Square Replacement Pins 3 Pack

Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new...

$21.99

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Brownells Ar-15/M16 Receiver Taps & Dies - Ar-15/M16 Receiver 1.250"-18 Tpi Die

Brownells Ar-15/M16 Receiver Taps & Dies - Ar-15/M16 Receiver 1.250"-18 Tpi Die

$20 off orders $250+. Use code VSJ.

Chases and cleans the two most important threads on the AR-15/M16 receivers. 1.250"-18 tpi - Corrects out of spec or cross-threaded upper receivers and barrel nuts. 1-3/16"-16 tpi - Makes receiver extension (recoil buffer) tube and lower receiver... ... more

Brownells Ar-15/M16 Receiver Taps & Dies - Ar-15/M16 Receiver 1.250"-18 Tpi Die

Chases and cleans the two most important threads on the AR-15/M16 receivers. 1.250"-18 tpi - Corrects out of spec or cross-threaded upper receivers and barrel nuts. 1-3/16"-16 tpi - Makes receiver extension (recoil buffer) tube and lower receiver...

$65.99

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Brownells Ar-15/M16 Barrel Extension Torque Tools - Ar-15/M16 Barrel Extension Torque Tool

Brownells Ar-15/M16 Barrel Extension Torque Tools - Ar-15/M16 Barrel Extension Torque Tool

$20 off orders $250+. Use code VSJ.

Handy tool aids in applying straight-line torque for fast, easy installation of the barrel nut without scratching the exterior of the upper receiver. Helps ensure the right amount of torque is evenly applied, while maintaining proper alignment of the... ... more

Brownells Ar-15/M16 Barrel Extension Torque Tools - Ar-15/M16 Barrel Extension Torque Tool

Handy tool aids in applying straight-line torque for fast, easy installation of the barrel nut without scratching the exterior of the upper receiver. Helps ensure the right amount of torque is evenly applied, while maintaining proper alignment of the...

$48.99

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The Device Manufacturing Ar-15/M16 Upper Receiver Fixture - Mk1mod0 Device

The Device Manufacturing Ar-15/M16 Upper Receiver Fixture - Mk1mod0 Device

$20 off orders $250+. Use code VSJ.

Professional Grade AR Upper Receiver Fixture. Robust fixture designed for years of hard use. Quick, intuitive interface that allows rapid building/rebuilding and repair of the entire upper receiver of the AR15/M16/M4 family of rifles/carbines/pistols.... ... more

The Device Manufacturing Ar-15/M16 Upper Receiver Fixture - Mk1mod0 Device

Professional Grade AR Upper Receiver Fixture. Robust fixture designed for years of hard use. Quick, intuitive interface that allows rapid building/rebuilding and repair of the entire upper receiver of the AR15/M16/M4 family of rifles/carbines/pistols....

$299.99

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Magpul Ar-15 Bev Block - Bev Block-Ar15/M4

Magpul Ar-15 Bev Block - Bev Block-Ar15/M4

$20 off orders $250+. Use code VSJ.

The BEV Block (Barrel Extension Vise) is an all-in-one, compact vise block tool for AR assembly operations of barrel nuts, flash hiders, etc. Mounts securely in a vise and provides support for both billet and forged upper receivers. Engages barrel... ... more

Magpul Ar-15 Bev Block - Bev Block-Ar15/M4

The BEV Block (Barrel Extension Vise) is an all-in-one, compact vise block tool for AR assembly operations of barrel nuts, flash hiders, etc. Mounts securely in a vise and provides support for both billet and forged upper receivers. Engages barrel...

$47.45 $35.99

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Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Round Replacement Pins 3 Pack

Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Round Replacement Pins 3 Pack

$20 off orders $250+. Use code VSJ.

Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new... ... more

Brownells Ar-15/M16/M4 Replacement Pins - Ar-15/M16/M4 Round Replacement Pins 3 Pack

Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new...

$9.99

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Aero Precision Ar-15 Assembled Upper Receiver 5.56mm - Ar-15 Assembled Upper Receiver, No Forward As

Aero Precision Ar-15 Assembled Upper Receiver 5.56mm - Ar-15 Assembled Upper Receiver, No Forward As

$20 off orders $250+. Use code VSJ.

The AR15 Assembled Upper Receiver comes with the port door already installed. This specific model does not have forward assist provisions. Forged from 7075-T6 aluminum, this assembled upper is precision machined to mil-spec M16/M4 specifications and... ... more

Aero Precision Ar-15 Assembled Upper Receiver 5.56mm - Ar-15 Assembled Upper Receiver, No Forward As

The AR15 Assembled Upper Receiver comes with the port door already installed. This specific model does not have forward assist provisions. Forged from 7075-T6 aluminum, this assembled upper is precision machined to mil-spec M16/M4 specifications and...

$89.24 $72.99

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Brownells Ar-15/M16 Mil-Spec Buffer Tube Assembly - M4 Mil-Spec Buffer Tube Assembly

Brownells Ar-15/M16 Mil-Spec Buffer Tube Assembly - M4 Mil-Spec Buffer Tube Assembly

$20 off orders $250+. Use code VSJ.

Features: Six position AR-15/M16/M4 receiver extension assembly Includes Mil-Spec receiver extension/buffer tube, receiver lock plate, lock-nut/castle nut, carbine buffer and carbine buffer spring Buffer tube is Mil-Spec diameter and 6061 aluminum... ... more

Brownells Ar-15/M16 Mil-Spec Buffer Tube Assembly - M4 Mil-Spec Buffer Tube Assembly

Features: Six position AR-15/M16/M4 receiver extension assembly Includes Mil-Spec receiver extension/buffer tube, receiver lock plate, lock-nut/castle nut, carbine buffer and carbine buffer spring Buffer tube is Mil-Spec diameter and 6061 aluminum...

$65.99 $45.99

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Aero Precision Epc-9 9mm/40 S&W Carbine Complete Lower W/A2 Grip & M4 Stock - Epc-9 Carbine Complete

Aero Precision Epc-9 9mm/40 S&W Carbine Complete Lower W/A2 Grip & M4 Stock - Epc-9 Carbine Complete

$20 off orders $250+. Use code VSJ.

The Aero Precision EPC-9 Complete Lower Receiver is the perfect base for your custom AR9 build. Includes: EPC-9 Lower Receiver A2 Pistol Grip M4 Stock Lower Parts Kit Enhanced Buffer Tube EPC 7.7oz Buffer M5 Carbine Buffer Spring Castle nut/end plate... ... more

Aero Precision Epc-9 9mm/40 S&W Carbine Complete Lower W/A2 Grip & M4 Stock - Epc-9 Carbine Complete

The Aero Precision EPC-9 Complete Lower Receiver is the perfect base for your custom AR9 build. Includes: EPC-9 Lower Receiver A2 Pistol Grip M4 Stock Lower Parts Kit Enhanced Buffer Tube EPC 7.7oz Buffer M5 Carbine Buffer Spring Castle nut/end plate...

$259.24

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Brownells Ar-15/M16 Receiver Taps & Dies - 1-3/16-16 Carbon Steel Hex Die

Brownells Ar-15/M16 Receiver Taps & Dies - 1-3/16-16 Carbon Steel Hex Die

$20 off orders $250+. Use code VSJ.

Chases and cleans the two most important threads on the AR-15/M16 receivers. 1.250"-18 tpi - Corrects out of spec or cross-threaded upper receivers and barrel nuts. 1-3/16"-16 tpi - Makes receiver extension (recoil buffer) tube and lower receiver... ... more

Brownells Ar-15/M16 Receiver Taps & Dies - 1-3/16-16 Carbon Steel Hex Die

Chases and cleans the two most important threads on the AR-15/M16 receivers. 1.250"-18 tpi - Corrects out of spec or cross-threaded upper receivers and barrel nuts. 1-3/16"-16 tpi - Makes receiver extension (recoil buffer) tube and lower receiver...

$39.99

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Brownells Ar-15/M16 Receiver Taps & Dies - 1 3/16"-16 Tpi Tap

Brownells Ar-15/M16 Receiver Taps & Dies - 1 3/16"-16 Tpi Tap

$20 off orders $250+. Use code VSJ.

Chases and cleans the two most important threads on the AR-15/M16 receivers. 1.250"-18 tpi - Corrects out of spec or cross-threaded upper receivers and barrel nuts. 1-3/16"-16 tpi - Makes receiver extension (recoil buffer) tube and lower receiver... ... more

Brownells Ar-15/M16 Receiver Taps & Dies - 1 3/16"-16 Tpi Tap

Chases and cleans the two most important threads on the AR-15/M16 receivers. 1.250"-18 tpi - Corrects out of spec or cross-threaded upper receivers and barrel nuts. 1-3/16"-16 tpi - Makes receiver extension (recoil buffer) tube and lower receiver...

$65.99

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Jmac Customs M4-Akm Stamped Receiver

Jmac Customs M4-Akm Stamped Receiver

$20 off orders $250+. Use code VSJ.

Attach most M16/M4 style braces or stocks to your favorite AKM/AK74 rifle, including the KR-103. JMAC's M4-AKM Stock/Brace adapter is very unique in the way it mounts to the rifle! JMAC's completely replaces the factory T-Nut with JMAC's proprietary... ... more

Jmac Customs M4-Akm Stamped Receiver

Attach most M16/M4 style braces or stocks to your favorite AKM/AK74 rifle, including the KR-103. JMAC's M4-AKM Stock/Brace adapter is very unique in the way it mounts to the rifle! JMAC's completely replaces the factory T-Nut with JMAC's proprietary...

$88.16

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Aero Precision Ar-15 Stripped Upper Receiver 5.56mm - Ar-15 Stripped Upper Receiver, No Forward Assi

Aero Precision Ar-15 Stripped Upper Receiver 5.56mm - Ar-15 Stripped Upper Receiver, No Forward Assi

$20 off orders $250+. Use code VSJ.

The AR15 Stripped Upper Receiver is one of Aero Precision's most popular products. Forged from 7075-T6 aluminum, this stripped upper is precision machined to mil- spec M16/M4 specifications and features M4 feedramps. On this specific model, the forward... ... more

Aero Precision Ar-15 Stripped Upper Receiver 5.56mm - Ar-15 Stripped Upper Receiver, No Forward Assi

The AR15 Stripped Upper Receiver is one of Aero Precision's most popular products. Forged from 7075-T6 aluminum, this stripped upper is precision machined to mil- spec M16/M4 specifications and features M4 feedramps. On this specific model, the forward...

$80.74 $67.99

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Sharps Bros Ar-15 Billet Upper Receiver - Ar-15 Billet Upper Receiver Assembled

Sharps Bros Ar-15 Billet Upper Receiver - Ar-15 Billet Upper Receiver Assembled

$20 off orders $250+. Use code VSJ.

The SBUR04 matches all of the Sharps Bros lower receivers perfectly and has a mil-spec front end that is compatible with any AR15 barrel nut & any AR15 handguard out there, including those with rear facing tabs. This receiver is meant for .223, 5.56,... ... more

Sharps Bros Ar-15 Billet Upper Receiver - Ar-15 Billet Upper Receiver Assembled

The SBUR04 matches all of the Sharps Bros lower receivers perfectly and has a mil-spec front end that is compatible with any AR15 barrel nut & any AR15 handguard out there, including those with rear facing tabs. This receiver is meant for .223, 5.56,...

$194.70

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Aero Precision Ar-15 Complete Lower Receiver Standard - Ar-15 Standard Complete Lower Receiver - Bla

Aero Precision Ar-15 Complete Lower Receiver Standard - Ar-15 Standard Complete Lower Receiver - Bla

$20 off orders $250+. Use code VSJ.

The Aero Precision AR-15 Complete Lower Receiver is the perfect base for your custom AR-15 rifle. All parts below come installed. AR15 Gen 2 Lower Receiver - Anodized Black M4 Stock - Black A2 Grip - Black Mil-spec Lower Parts Kit Carbine Receiver... ... more

Aero Precision Ar-15 Complete Lower Receiver Standard - Ar-15 Standard Complete Lower Receiver - Bla

The Aero Precision AR-15 Complete Lower Receiver is the perfect base for your custom AR-15 rifle. All parts below come installed. AR15 Gen 2 Lower Receiver - Anodized Black M4 Stock - Black A2 Grip - Black Mil-spec Lower Parts Kit Carbine Receiver...

$208.24

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Brownells Ar-15/M16/M4 Buttstock Tool

Brownells Ar-15/M16/M4 Buttstock Tool

$20 off orders $250+. Use code VSJ.

Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new... ... more

Brownells Ar-15/M16/M4 Buttstock Tool

Our handy, compact tool is uniquely designed to combine several tools into one. It has a spanner wrench that fits the receiver extension castle nut on M4-style collapsible buttstocks, with interchangeable pins to fit nuts with both old (round) and new...

$59.99 $29.46

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Magpul Ar-15/M16 Armorer's Wrench - Armorer's Wrench

Magpul Ar-15/M16 Armorer's Wrench - Armorer's Wrench

$20 off orders $250+. Use code VSJ.

American-Made, solid steel construction with grip-enhancing phosphate finish engages both stock and pin-style barrel nuts. Fits standard sized flash hiders. Installs and removes rifle receiver extensions and carbine castle nuts, with extended teeth for... ... more

Magpul Ar-15/M16 Armorer's Wrench - Armorer's Wrench

American-Made, solid steel construction with grip-enhancing phosphate finish engages both stock and pin-style barrel nuts. Fits standard sized flash hiders. Installs and removes rifle receiver extensions and carbine castle nuts, with extended teeth for...

$75.95 $57.99

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Rock River Arms Ar-15 M4 Stock Wrench - M4 Stock Wrench

Rock River Arms Ar-15 M4 Stock Wrench - M4 Stock Wrench

$20 off orders $250+. Use code VSJ.

Steel, dual function wrench lets you easily remove your old extension tube and install a new-style, A4 stock. Spanner has three lugs to fit the A4-style castle nut. Provides a non-slip fit so you can hand tighten the castle nut to the receiver. Also,... ... more

Rock River Arms Ar-15 M4 Stock Wrench - M4 Stock Wrench

Steel, dual function wrench lets you easily remove your old extension tube and install a new-style, A4 stock. Spanner has three lugs to fit the A4-style castle nut. Provides a non-slip fit so you can hand tighten the castle nut to the receiver. Also,...

$13.49 $5.99

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Brownells Car-15/M4 Buttstock Wrench - M4 Buttstock Wrench

Brownells Car-15/M4 Buttstock Wrench - M4 Buttstock Wrench

$20 off orders $250+. Use code VSJ.

Dedicated wrench has four precision-machined teeth that ensure full, non-slip engagement of all four notches in an M4-type receiver extension nut for easy removal and installation of collapsible carbine buttstocks. Transfers all the torquing force to... ... more

Brownells Car-15/M4 Buttstock Wrench - M4 Buttstock Wrench

Dedicated wrench has four precision-machined teeth that ensure full, non-slip engagement of all four notches in an M4-type receiver extension nut for easy removal and installation of collapsible carbine buttstocks. Transfers all the torquing force to...

$87.99 $49.99

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Crosstac Cross Tac Corp Car-15/M4 Ambi Single-Point Sling Connector - Single-Point Sling Adapter

Crosstac Cross Tac Corp Car-15/M4 Ambi Single-Point Sling Connector - Single-Point Sling Adapter

$20 off orders $250+. Use code VSJ.

Minimal profile sling adapter plate provides secure, ambidextrous attachment for single-point tactical slings on carbines or converted shotguns with M4 collapsible buttstocks. The attachment loop centers under the receiver extension nut, out of the... ... more

Crosstac Cross Tac Corp Car-15/M4 Ambi Single-Point Sling Connector - Single-Point Sling Adapter

Minimal profile sling adapter plate provides secure, ambidextrous attachment for single-point tactical slings on carbines or converted shotguns with M4 collapsible buttstocks. The attachment loop centers under the receiver extension nut, out of the...

$20.99

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Brownells Ar-15/M16 Combination Wrench

Brownells Ar-15/M16 Combination Wrench

$20 off orders $250+. Use code VSJ.

An exact duplicate of the original factory/military design so you know it will fit and work. Use for several jobs: to remove the barrel nut; to remove and install old and new flash suppressors; to remove and install the lower receiver extension. Mfg:... ... more

Brownells Ar-15/M16 Combination Wrench

An exact duplicate of the original factory/military design so you know it will fit and work. Use for several jobs: to remove the barrel nut; to remove and install old and new flash suppressors; to remove and install the lower receiver extension. Mfg:...

$34.99

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Jmac Customs M4-Modular Rear Kalashnikov Trunnion Adapter

Jmac Customs M4-Modular Rear Kalashnikov Trunnion Adapter

$20 off orders $250+. Use code VSJ.

THIS IS FOR THE ADAPTER ONLY, FITS ANY OF JMAC's MRKT Trunnions Attach most M16/M4 style braces or stocks to your MRKT Trunnion with this Adapter! Stake that Castle Nut!! No Need to Remove the Buffer Tube to swap adapters! Installs in less than 1 min... ... more

Jmac Customs M4-Modular Rear Kalashnikov Trunnion Adapter

THIS IS FOR THE ADAPTER ONLY, FITS ANY OF JMAC's MRKT Trunnions Attach most M16/M4 style braces or stocks to your MRKT Trunnion with this Adapter! Stake that Castle Nut!! No Need to Remove the Buffer Tube to swap adapters! Installs in less than 1 min...

$58.46

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Fightlite Industries Mcr Bolt Catch

Fightlite Industries Mcr Bolt Catch

$20 off orders $250+. Use code VSJ.

Fits in a mil spec AR15/M4/M16 lower receiver. For use with MCR upper receiver assemblies, provides the necessary clearance for the wider MCR upper receiver. Mfg: Fightlite Industries ... more

Fightlite Industries Mcr Bolt Catch

Fits in a mil spec AR15/M4/M16 lower receiver. For use with MCR upper receiver assemblies, provides the necessary clearance for the wider MCR upper receiver. Mfg: Fightlite Industries

$17.99

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