AR-15 Takedown Pin Detent
The AR-15 Takedown Pin Detent from United Defense is a MIL-SPEC replacement detent for the rear takedown pin on any standard AR-15, M16, or M4-pattern lower receiver. Machined from hardened steel to exact military dimensions, it drops straight into the detent channel and works with a standard takedown pin detent spring to keep the pin captured during disassembly. Small parts like this one are the first to launch across the bench during a build, so a spare in the parts bin is cheap insurance. Ideal for AR-15 builders, gunsmiths, and shooters maintaining a working rifle.
In stock
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- SKU
- 8448585-1
$3.95
Description
Features
- MIL-SPEC Dimensions — Manufactured to military specifications for a precise, drop-in fit in any standard AR-15 lower receiver.
- Hardened Steel Construction — Machined from hardened steel for long service life and resistance to wear under repeated takedown cycles.
- Universal AR Platform Compatibility — Works with AR-15, M16, and M4-pattern lowers from any major manufacturer.
- Retains Takedown Pin — Seats against the takedown pin to keep it captured in the receiver while still allowing smooth disassembly.
- Pairs With Standard Detent Spring — Designed to ride on a standard AR-15 takedown pin detent spring with no fitting required.
- Essential Build Component — A must-have small part for any AR-15 lower parts kit, scratch build, or repair job.
- Affordable Spare — Inexpensive enough to keep several on hand for the inevitable launched detent during reassembly.
- Compact and Lightweight — Small-diameter steel pin adds zero meaningful weight to the rifle while doing critical retention work.
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Customer Reviews
Top customer reviews
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Spare for the parts binBought a couple of these to keep in my backup parts kit since these little detents are the first thing to go flying when youre tearing down a lower, but honestly my wife ends up swapping parts on her build way more than I do now. Fits the rear takedown pin channel perfectly and is true to mil-spec dimensions, just wish they came in a small multi-pack so I didnt have to order them individually.
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Simple, high-quality replacement detent.This detent fit perfectly in my lower receiver. It provides solid tension and keeps my takedown pin securely in place.
New and works great!
Very small and easy to lose which is why I had to order more of these lol
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