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Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut FDE

Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut FDE

Strike Industries · Buffer Tubes & Springs

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Best price

$35.95at Brownells

In stock checked Nov 10, 2026

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Compare 9 stores

Where to buy

StorePriceAvailabilityBuyAdd to build
Brownells Best price $35.95checked Nov 10, 2026 In stock Buy at Brownells
Ammunition Depot $35.95checked Nov 10, 2026 In stock Buy at Ammunition Depot
MidwayUSA $35.95checked Nov 10, 2026 In stock Buy at MidwayUSA
Kentucky Gun Co $35.95checked Nov 10, 2026 In stock Buy at Kentucky Gun Co
OpticsPlanet $39.89Salechecked Nov 10, 2026 In stock Buy at OpticsPlanet
AR15Discounts $35.95checked Nov 10, 2026 Check store Buy at AR15Discounts
Dirty Bird $35.95checked Nov 10, 2026 Check store Buy at Dirty Bird
Battlehawk Armory $35.95Salechecked Nov 10, 2026 Check store Buy at Battlehawk Armory
Palmetto State Armory $35.99checked Nov 10, 2026 Check store Buy at Palmetto State Armory

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Lowest in-stock price in the last 30 days: $35.95 at Ammunition Depot. Dashed line = out of stock. Tracking since Oct 28, 2026.

Show the prices as a table
StoreLatestLowestHighest
AR15Discounts$35.95$35.95$35.95
Ammunition Depot$35.95$35.95$35.95
Battlehawk Armory$35.95$35.95$35.95
Brownells$35.95$35.95$35.95
Dirty Bird$35.95$35.95$35.95
Kentucky Gun Co$35.95$35.95$35.95
MidwayUSA$35.95$35.95$35.95
OpticsPlanet$39.89$39.89$39.89
Palmetto State Armory$35.99$35.99$35.99

Since Oct 28, 2026.

About this part

The Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut FDE is a buffer part from Strike Industries. It's sold by 9 stores (5 in stock), from $35.95 to $39.89. The lowest in-stock price in the last 30 days was $35.95 at Ammunition Depot.

Specifications

Manufacturer
Strike Industries

From the manufacturer

Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut FDE One Size. While the traditional endplate and castle nut works extremely well in retaining your receiver extension the peening of the castle nut is not conducive to rebuilding or upgrading. With the vast amount of aftermarket support for the AR system today SI feels that theres a need for a secure system as adaptive as you are. Enter the MFEP and ACN. The SI MFEP and ACN offers a built-in anti-rotation QD socket and sling loops. The MFEP is reversible to orientate sling loops to desired side. The Anti-Rotation Castle Nut (ACN) is specifically designed to work with the Multi-Function End Plate (MFEP). Instead of peening the endplate to secure the castle nut a set screw fulfills this function to allow for multiple uses as you upgrade or update your build. Also never worry about finding a flying takedown pin detent and spring again as there is an included set screw on the MFEP for ease of installation or removal. Consider the Strike Industries Ultralight Multi-Function End Plate and Black Anti-Rotation Castle Nut for your next build or upgrade for both functionality and form of your AR-15 and/or AR-10. Specifications for Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut: Manufacturer: Strike Industries Fabric/Material: Ultralight 7075-T6 Aluminum Gun Make: AR Platform Gun Model: AR-10 AR-15 Weight: 1 oz Condition: New Features of Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut End plate set screw to retain takedown pin detent and spring for ease of installation or removal Multi-Function End Plate is reversible to orientate sling loops to desired side No peening or staking needed with the Anti-Rotation Castle Nut and Multi-Function End Plate design Anti-rotation QD socket Multiple sling loop attachment points Package Contents: Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut X1 Multifunction End Plate X1 Antirotation Castle Nut X1 Set Screw For Antirotation X1 Set Screw For Detent And Spring X1 Loctite Threadlocker Blue242 X1 Warning Card What firearm models does the manufacturer say Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut is compatible with? The manufacturer says that Strike Industries Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut is compatible with AR-15 AR-10Strike Industries SI-AR-UL-MFEP&ACN-FDE: Ultralight Multi-Function End Plate w/ Anti-Rotation Castle Nut FDE One Size

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$35.95 at Brownells
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