These are new AR-15 / M4 parts that will fit AR-10 and LR-308 in many cases as well.

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Crush washer - 1/2", common for 5.56/.223 ARs and others Crush washer - 3/4", common for 12.7x42 and others
Crush washer - 1/2", common for 5.56/.223 ARs and othersCrush washer - 3/4", common for 12.7x42 and others

This is a 1/2" steel crush washer. It's most common use is on 5.56/.223 ARs as well as other rifles and pistols. Be sure to confirm the size of washer by measuring your barrel and/or what the maker tells you. Pricing is per washer and there are...

This is a 49/64ths" steel crush washer. It's most common use is on .50 Beowulf ARs as well as other rifles and pistols. Pricing is per washer and there are volume discounts. Approximate dimensions: Inner diameter: 0.759" Outer diameter: 0.953"...

$3.99

$4.99

Crush washer - 49/64", common for .50 Beowulf and others Crush washer - 5/8" common for 7.62/.308 ARs and other weapons
Crush washer - 49/64", common for .50 Beowulf and othersCrush washer - 5/8" common for 7.62/.308 ARs and other weapons

This is a 49/64ths" steel crush washer. It's most common use is on .50 Beowulf ARs as well as other rifles and pistols. Be sure to confirm the size of washer by measuring your barrel and/or what the maker tells you. Pricing is per washer and...

This is a 5/8" steel crush washer. It's most common use is on 7.26/.308 and a number of big bore ARs as well as other rifles and pistols. Be sure to confirm the size of washer by measuring your barrel and/or what the maker tells you. Pricing is...

$7.99

$3.99

AR Grip Screw - Allen/Hex Head Button Style with lock washer AR Grip Screw - Allen/Hex Head Socket Style with lock washer
AR Grip Screw - Allen/Hex Head Button Style with lock washerAR Grip Screw - Allen/Hex Head Socket Style with lock washer

This is a 1/4" x 28 thread pitch x 1" long alloy screw that has a allen/hex head button top that uses a 5/32" key. This will fit most AR-15 and AR-308 type rifles and pistols. Included with the screw is 1/4" external tooth lock washer. The reason...

This is a 1/4" x 28 thread pitch x 1" long alloy screw that has a allen head socket top that uses a 3/16" key. This will fit most AR-15 and AR-308 type rifles and pistols. Included with the screw is 1/4" external tooth lock washer. The reason for...

$2.99

$2.99

AR Upper Receiver Wedge, Red Synthetic Rubber AR/M4 Bolt Catch Plunger / Detent
AR Upper Receiver Wedge, Red Synthetic RubberAR/M4 Bolt Catch Plunger / Detent

These wedges are designed to push an AR upper receiver upwards to remove slack that can cause the upper to wiggle and lose accuracy during firing. It is made from a syntheticr ubber and can be sanded/trimmed to fit if needed. Many times it drops...

This is a Mil-Spec bolt catch plunger.  It sits on top of the spring and applies pressure to the bolt catch.

Made in the USA.

$2.99

$1.99

AR/M4 Bolt Catch Spring AR/M4 Buffer Retainer
AR/M4 Bolt Catch SpringAR/M4 Buffer Retainer

This is a Mil-Spec bolt catch spring.  It applies pressure to the bolt catch plunger in AR-15 and LR-308 lowers.

Made in the USA

This is the retainer that keeps the buffer in it's tube.  It's a Mil-Spec Part

Made in the USA!

$1.99

$1.99

AR/M4 Buffer Retainer Spring AR/M4 Buffer Spring
AR/M4 Buffer Retainer SpringAR/M4 Buffer Spring

This is a Mil-Spec spring that sits in the receiver and pushes the buffer retainer upwards.

Made in the USA!

This is a Mil-Spec buffer spring for AR/M4 carbines and pistols with a carbine length tube.

Made in the USA!

$1.99

$3.49