AR-15 Bolt Catch Roll Pin
The United Defense AR-15 Bolt Catch Roll Pin is a MIL-SPEC replacement pin built to specification MS16561-119 for use on any standard AR-15 or M4-pattern lower receiver. This 3/32" x 1/2" slotted spring pin is made from heat-treated carbon steel with a manganese phosphate finish to match factory hardware and resist corrosion. It secures the bolt catch, plunger, and spring assembly inside the lower, holding everything in place under hard use. A must-have spare for AR-15 builders, armorers, and anyone running their rifle hard enough to occasionally bugger a pin.
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- SKU
- MS16561-119
$1.95
Description
Features
- MIL-SPEC Replacement Pin — Built to military specification MS16561-119 for a true drop-in fit on any standard AR-15 lower receiver.
- Bolt Catch Retention — Secures the bolt catch assembly to the lower receiver, holding the catch, plunger, and spring in proper alignment.
- 3/32" x 1/2" Dimensions — Standard 0.094" diameter by 0.500" length slotted spring pin sized for the AR-15 bolt catch pin channel.
- Carbon Steel Construction — Heat-treated carbon spring steel resists shear and deformation under repeated bolt catch impact.
- Manganese Phosphate Finish — Parkerized black finish matches factory AR-15 hardware and provides corrosion resistance.
- Slotted Spring Pin Design — Compresses on installation for a tight, vibration-resistant hold that won't walk out under recoil.
- Direct Replacement Part — Ideal for armorers, builders, and shooters replacing a lost, damaged, or buggered pin during a lower build or repair.
- Universal AR-15 Compatibility — Fits all standard MIL-SPEC AR-15 and M4-pattern lower receivers chambered in 5.56 NATO, .223 Rem, and related variants.
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Customer Reviews
Top customer reviews
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Very SatisfiedFinest AR15 bolt catch roll pin for the buck shipped by a awesome company. Thank you ks!
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Good ProductI ordered two of these bolt catch roll pins. Using one for repair, other is spare.
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Exactly as pictured.bolt catch roll pins look wonderful. Exactly what I wanted.
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HappyHappy with this company.
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Very PleasedReceived in four days after placing my order. Will be back to buy from Keepshooting again.
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