Give your build the same attention to detail as a factory rifle with the Colt AR15A4 Bolt Catch Pin – Part #160308102. This small but critical pin secures the bolt catch in your lower receiver and is essential for reliable last-round lock-back and manual bolt hold-open on AR-15, AR-15/M4, and M16 platforms. Designed and manufactured by Colt, this is a true OEM component you can trust in any serious AR build or repair. Brownells UK+2Brownells Norge+2
OEM Colt Quality – AR15A4 Bolt Catch Pin 160308102
Multiple distributors list this part specifically as “COLT AR15A4 Bolt Catch Pin” with product number 160308102 and manufacturer reference SP95105. Brownells Norge+2Brownells UK+2
Choosing a genuine Colt pin means the dimensions, hardness, and fit are set up around true Colt TDP-style specs, not generic “close enough” tolerances.
Designed to Fit AR-15, AR-15/M4 & M16 Lowers
This AR15A4 bolt catch pin is listed as fitting AR-15 – Common Parts, and specifically compatible with: Brownells UK+2Brownells Norge+2
If your lower receiver is built to standard AR-15 geometry, this Colt pin is engineered to secure the bolt catch in the correct location and interface properly with the catch recess and roll-pin bosses in the receiver.
The Job of a Bolt Catch Pin – Small Part, Big Function
The bolt catch pin anchors the bolt catch to the left side of the AR-15 lower receiver, allowing it to pivot reliably when actuated by:
A properly sized and hardened pin helps ensure:
Consistent pivot motion of the bolt catch
Secure retention under recoil and repeated cycling
Reduced risk of excessive wobble or premature wear at the catch pivot point
Using a high-quality OEM pin like the Colt AR15A4 Bolt Catch Pin 160308102 supports long-term reliability of this essential control.
Durable Steel Construction & Compact Form Factor
While most listings don’t spell out alloy specifics, this part is categorized under Colt rifle parts / bolt catch hardware and described as a robust, precision pin suitable for critical receiver functions. Brownells UK+2Primary Tactical+2
Key physical attributes:
Material: Steel pin sized for AR-15 bolt catch pivot
Finish: Standard small-part finish suitable for internal/external receiver use
Delivery / Shipping Weight: Approximately 0.005 kg (about 0.01–0.02 lb depending on packaging) Brownells UK+2Brownells Norge+2
Shipping dimensions (as listed by Brownells):
This is a small, inexpensive part—but it plays an outsized role in the function and feel of your rifle.
Ideal for Builds, Refreshes & OEM-Correct Clones
Because it’s a Colt-branded, AR15A4-labeled part, the 160308102 bolt catch pin is a perfect choice when:
Completing a Colt-correct AR15A4 or M16-style build using as many genuine Colt parts as possible
Repairing or refreshing an existing rifle with worn or damaged bolt catch hardware
Stocking spares in an armorer’s kit for department rifles or high-round-count range guns
Retailers like Brownells, AmmoMart, Yellowstone Armory, and others consistently categorize it as a Colt AR-15 small part in their rifle receivers & parts sections, underlining its role as a core functional component rather than a cosmetic accessory. yellowstone-armory.com+3Brownells+3Brownells UK+3
Simple Installation (Standard AR-15 Procedure)
The AR15A4 Bolt Catch Pin installs using familiar AR-15 armorer techniques:
Ensure the firearm is unloaded and safe before any work.
Position the bolt catch, spring, and plunger in the receiver’s bolt catch recess.
Carefully drive the bolt catch pin through the holes in the receiver and bolt catch using a starter punch, support block, and roll pin punch or similar tools.
Brownells and other vendors note this is a “Fits: AR-15 – Common Parts” component, meaning it’s meant to work with standard AR-15 lower receiver dimensions. Brownells UK+1
If you’re not comfortable working around your lower receiver, consult a qualified gunsmith or armorer for installation.
Why Choose Colt’s AR15A4 Bolt Catch Pin?
From European Brownells storefronts to U.S. dealers, product descriptions emphasize that this Colt pin is:
For builders who want peace of mind and brand consistency, a genuine Colt pin is a simple, cost-effective way to keep the small parts as trustworthy as the big ones.
Key Features – AR15A4 Bolt Catch Pin 160308102
Add the Colt AR15A4 Bolt Catch Pin 160308102 to your parts list and ensure that one of your rifle’s most important small components is built to the same standard as the rest of your build.
The End
